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Poly bags are one of the cheapest packaging supplies in your warehouse, and one of the easiest to get wrong. Order the wrong thickness and products tear through in transit. Order the wrong size and your team wastes time fighting bags that don’t fit. This guide covers the main poly bag types, what mil thickness actually means, and a simple formula for sizing bags correctly the first time.

The Main Types of Poly Bags

Most warehouse and fulfillment operations use a handful of standard styles. Knowing the differences helps you avoid paying for features you don’t need.

• Flat open-top bags – The workhorse. An open mouth on one end, sealed on the other three sides. Ideal for parts, apparel, and anything you’ll heat-seal, tape, or twist-tie closed.
• Reclosable zip bags – A press-to-close zipper lets the end user open and reseal the bag. Common for hardware kits, small parts, and retail items that get handled repeatedly.
• Gusseted bags – Expandable sides or bottom let the bag open into a squared shape. The right choice for bulky or irregular items like bundled products, food service portions, or box liners.
• Lip and tape (self-seal) bags – A fold-over flap with permanent or resealable adhesive. Fast to close on a packing line with no equipment, which is why apparel shippers love them.
• Wicketed bags – Stacked on a metal wicket for high-speed manual or automated packing. If your team bags hundreds of identical items per shift, wickets pay for themselves in speed.

What Mil Thickness Really Means

Poly bag thickness is measured in mils. One mil is one-thousandth of an inch, so a 2 mil bag is 0.002″ thick. Thickness drives both protection and price, and most buyers only need a few reference points:

• 1 mil – Lightweight dust protection for soft goods like apparel and linens. Not for anything with edges or weight.
• 1.5–2 mil – The most common general-purpose range. Handles typical parts, literature, and light products through normal warehouse handling.
• 3 mil – Step up here for metal parts, hardware, and items with moderate weight or mildly sharp edges.
• 4 mil – Heavy parts, bolts, castings, and industrial components. Good puncture resistance.
• 6 mil and up – Very sharp or very heavy items, plus outdoor or long-term storage applications.

The most common mistake we see is defaulting to a heavier bag “to be safe.” If a 2 mil bag has never failed you, moving to 3 mil just adds cost on every unit you ship. Test the lighter gauge on a sample run before committing a blanket order.

How to Size a Poly Bag Correctly

Bag dimensions are listed width first, then length, measured on the inside. For flat items, add 1″ to the product width and 1.5–2″ to the length so you have room to close the bag. For items with depth, use this formula:

• Bag width = product width + product depth + 1″
• Bag length = product length + product depth + 2″ (add more if you’re heat-sealing or folding the top over)

So a part measuring 8″ long × 5″ wide × 2″ deep needs a bag roughly 8″ wide × 12″ long. When in doubt, size up slightly. A bag that’s a touch loose still works; a bag that’s too tight gets thrown away.

Special Cases: Static, FDA, and Suffocation Warnings

A few applications need more than a standard bag. Electronics and circuit boards call for anti-static pink poly or shielding bags. Food contact requires FDA-approved food-grade poly. And if you ship apparel or any bag larger than 5″ in opening size to consumers, most retailers and marketplaces require a printed suffocation warning. These are all stock items, not exotic special orders, so ask before you settle for the wrong bag.

Buying Poly Bags in Chicagoland

Poly bags are a classic bulk item: the unit price drops fast as case quantities go up, and they take up little storage space. If you’re running through cases every month, a bulk order program locks in better pricing and keeps you from running out mid-shift. KMS Distributing stocks poly bags in a wide range of sizes and gauges alongside 20,000+ other packaging supplies at our Prospect Heights warehouse, with next-business-day delivery across Chicagoland on most in-stock orders placed before noon. You can browse the full catalog at our online shop.

Need help picking the right poly bag, or ready to set up a bulk order? Call us at (847) 630-7502, email orders@kmsdistributing.com, or browse 20,000+ products at kmsdistributors.com/Shop. Free Chicagoland delivery on orders over $1,000.

When a packaging order runs low, the clock starts ticking. A national supplier might quote three to five business days for ground shipping, plus a freight surcharge if your order doesn’t hit a minimum. For a Chicagoland warehouse trying to keep a shipping line moving, that gap can mean idle pallets and missed customer deadlines. Local next-day delivery closes that gap. Here is why working with a supplier in your own backyard usually beats ordering from a distant distribution center.

Speed you can actually plan around

National e-commerce suppliers advertise fast shipping, but “fast” depends on which warehouse your order ships from and how busy the carrier network is that week. A box of stretch film ordered Monday afternoon might not arrive until Thursday or Friday. With a local distributor, most in-stock orders placed before noon deliver the next business day across the Chicago metro area. That predictability lets you run leaner on inventory because you are never more than a day away from a refill.

Lower landed cost, not just lower list price

The sticker price on a national site can look attractive until you add shipping, fuel surcharges, and the cost of carrying extra safety stock to cover long lead times. Bulky, lightweight packaging products like corrugated boxes and void fill are especially expensive to ship long distances because they take up trailer space relative to their weight. A local supplier that offers free Chicagoland delivery on orders over $1,000 removes that freight penalty entirely, so the price you see is much closer to the price you actually pay.

Real support when something goes sideways

Packaging problems rarely happen at a convenient time. A tape that won’t stick in a cold dock, a box size that no longer fits a redesigned product, a strapping spec that fails QC. With a national supplier, your recourse is usually a chat window and a return shipping label. A local distributor can talk through the issue, recommend an alternative from stock, and often have it on your dock the next morning. That hands-on help matters most for the products that need a human conversation anyway, like custom boxes, printed tape, and bulk orders.

One local partner for the whole supply list

National marketplaces are wide but shallow on service. You can buy almost anything, but you are stitching together orders from multiple third-party sellers, each with its own shipping timeline and return policy. A full-line local distributor lets you consolidate everything onto one purchase order:

• Corrugated boxes, mailers, and custom sizes
• Carton sealing tape, including custom color and printed tape
• Stretch film, strapping, and load-securing supplies
• Bubble, foam, and paper void fill
• Poly bags, janitorial, and safety supplies

Consolidating onto one trusted local partner simplifies receiving, invoicing, and reordering. You can set up a recurring supply program so the items you burn through every week show up on schedule, without anyone having to remember to place the order. Browse the full catalog of 20,000+ products anytime at our online store.

When does national still make sense?

To be fair, a national supplier can be the right call for a one-off purchase of an unusual specialty item that no regional distributor stocks, or for a business located far from any metro supply hub. But for a Chicagoland operation buying packaging supplies on a regular cadence, the math almost always favors local: faster delivery, lower landed cost, and a real person who knows your account. The closer your supplier sits to your dock door, the less you pay to wait.

Need packaging supplies on your dock tomorrow? Call KMS Distributing at (847) 630-7502, email orders@kmsdistributing.com, or browse 20,000+ products at our online store. Enjoy free Chicagoland delivery on orders over $1,000.

When a packaging order runs low, the clock starts ticking. A national supplier might quote three to five business days for ground shipping, plus a freight surcharge if your order doesn’t hit a minimum. For a Chicagoland warehouse trying to keep a shipping line moving, that gap can mean idle pallets and missed customer deadlines. Local next-day delivery closes that gap. Here is why working with a supplier in your own backyard usually beats ordering from a distant distribution center.

Speed you can actually plan around

National e-commerce suppliers advertise fast shipping, but “fast” depends on which warehouse your order ships from and how busy the carrier network is that week. A box of stretch film ordered Monday afternoon might not arrive until Thursday or Friday. With a local distributor, most in-stock orders placed before noon deliver the next business day across the Chicago metro area. That predictability lets you run leaner on inventory because you are never more than a day away from a refill.

Lower landed cost, not just lower list price

The sticker price on a national site can look attractive until you add shipping, fuel surcharges, and the cost of carrying extra safety stock to cover long lead times. Bulky, lightweight packaging products like corrugated boxes and void fill are especially expensive to ship long distances because they take up trailer space relative to their weight. A local supplier that offers free Chicagoland delivery on orders over $1,000 removes that freight penalty entirely, so the price you see is much closer to the price you actually pay.

Real support when something goes sideways

Packaging problems rarely happen at a convenient time. A tape that won’t stick in a cold dock, a box size that no longer fits a redesigned product, a strapping spec that fails QC. With a national supplier, your recourse is usually a chat window and a return shipping label. A local distributor can talk through the issue, recommend an alternative from stock, and often have it on your dock the next morning. That hands-on help matters most for the products that need a human conversation anyway, like custom boxes, printed tape, and bulk orders.

One local partner for the whole supply list

National marketplaces are wide but shallow on service. You can buy almost anything, but you are stitching together orders from multiple third-party sellers, each with its own shipping timeline and return policy. A full-line local distributor lets you consolidate everything onto one purchase order:

• Corrugated boxes, mailers, and custom sizes
• Carton sealing tape, including custom color and printed tape
• Stretch film, strapping, and load-securing supplies
• Bubble, foam, and paper void fill
• Poly bags, janitorial, and safety supplies

Consolidating onto one trusted local partner simplifies receiving, invoicing, and reordering. You can set up a recurring supply program so the items you burn through every week show up on schedule, without anyone having to remember to place the order. Browse the full catalog of 20,000+ products anytime at our online store.

When does national still make sense?

To be fair, a national supplier can be the right call for a one-off purchase of an unusual specialty item that no regional distributor stocks, or for a business located far from any metro supply hub. But for a Chicagoland operation buying packaging supplies on a regular cadence, the math almost always favors local: faster delivery, lower landed cost, and a real person who knows your account. The closer your supplier sits to your dock door, the less you pay to wait.

Need packaging supplies on your dock tomorrow? Call KMS Distributing at (847) 630-7502, email orders@kmsdistributing.com, or browse 20,000+ products at our online store. Enjoy free Chicagoland delivery on orders over $1,000.

Packing tape is the cheapest part of any shipment and the most common reason boxes fail in transit. A burst seam, a lid that pops open on a pallet, a carton that arrives taped shut but crushed at the corner, almost always traces back to the wrong tape for the job. With a warehouse full of options, picking the right one comes down to three things: the adhesive, the backing, and the weight of what you are shipping. Here is how to choose.

Start With the Adhesive: Acrylic vs. Hot Melt

Most carton sealing tape uses one of two adhesives, and the difference matters more than the price gap suggests.

• Acrylic adhesive holds up across a wide temperature range and resists yellowing and drying out over time. It is the right pick for cartons that sit in storage for months, ship in cold trucks, or move through a Chicago winter where loading docks swing from heated to freezing. It also runs quietly through a tape dispenser.
• Hot melt adhesive grabs faster and holds tighter on the initial stick, which makes it the better choice for heavy cartons and high-volume packing lines where speed matters. The trade-off is that hot melt is more sensitive to temperature extremes and has a shorter shelf life.

If your boxes are light to medium weight and ship quickly, hot melt is usually the most economical. If they sit, travel far, or face temperature swings, acrylic earns its keep.

Match the Backing to the Load

The backing is the film you actually see, and its thickness, measured in mils, tells you how much abuse the tape can take. Thicker is not always better, it is about matching the tape to the box weight so you are not overpaying or under-protecting.

• 1.6 to 1.8 mil handles light cartons up to about 30 pounds. Good for e-commerce parcels, small parts, and general fulfillment.
• 2.0 to 2.5 mil covers standard to heavy cartons in the 30 to 60 pound range, the workhorse weight for most warehouses.
• 3.0 mil and up is built for heavy or recycled-content boxes that need extra holding power, including overstuffed cartons and corrugated that has lost some rigidity.

When to Reach for Reinforced or Specialty Tape

Some shipments need more than standard film tape. Water-activated reinforced gummed tape (the kind with fiberglass strands) bonds to the corrugated itself and creates a tamper-evident seal that is hard to peel back undetected, which is why it is popular for high-value or theft-prone goods. Filament tape, with its lengthwise glass fibers, is built for bundling, palletizing, and reinforcing seams under tension rather than sealing flaps. And for anyone running color-coded operations, custom color and printed tape lets you sort by department, flag fragile loads, or seal cartons with your logo as free advertising on every doorstep.

Three Habits That Make Any Tape Work Better

• Use the H-taping method on heavier cartons, sealing the center seam plus both edge seams so the flaps cannot bow open.
• Apply tape to clean, dry, dust-free boxes. Adhesive will not bond to a dusty surface, and most “tape failures” are really surface failures.
• Keep a quality dispenser in good condition. A dragging or dull blade tears tape and slows your line more than people realize.

Buying tape by the case in the right spec also keeps your per-roll cost down, which is where bulk ordering pays off. Not sure which weight or adhesive fits your line? We stock acrylic, hot melt, reinforced, filament, and custom printed options, and can spec it to your boxes. Browse the full range at our online shop or call us to talk it through.

Ready to get the right tape on your dock? Call KMS Distributing at (847) 630-7502, email orders@kmsdistributing.com, or browse 20,000+ packaging products at our online shop. We offer free Chicagoland delivery on orders over $1,000, and most in-stock orders placed before noon ship next business day.

Packing tape is the cheapest part of any shipment and the most common reason boxes fail in transit. A burst seam, a lid that pops open on a pallet, a carton that arrives taped shut but crushed at the corner, almost always traces back to the wrong tape for the job. With a warehouse full of options, picking the right one comes down to three things: the adhesive, the backing, and the weight of what you are shipping. Here is how to choose.

Start With the Adhesive: Acrylic vs. Hot Melt

Most carton sealing tape uses one of two adhesives, and the difference matters more than the price gap suggests.

• Acrylic adhesive holds up across a wide temperature range and resists yellowing and drying out over time. It is the right pick for cartons that sit in storage for months, ship in cold trucks, or move through a Chicago winter where loading docks swing from heated to freezing. It also runs quietly through a tape dispenser.
• Hot melt adhesive grabs faster and holds tighter on the initial stick, which makes it the better choice for heavy cartons and high-volume packing lines where speed matters. The trade-off is that hot melt is more sensitive to temperature extremes and has a shorter shelf life.

If your boxes are light to medium weight and ship quickly, hot melt is usually the most economical. If they sit, travel far, or face temperature swings, acrylic earns its keep.

Match the Backing to the Load

The backing is the film you actually see, and its thickness, measured in mils, tells you how much abuse the tape can take. Thicker is not always better, it is about matching the tape to the box weight so you are not overpaying or under-protecting.

• 1.6 to 1.8 mil handles light cartons up to about 30 pounds. Good for e-commerce parcels, small parts, and general fulfillment.
• 2.0 to 2.5 mil covers standard to heavy cartons in the 30 to 60 pound range, the workhorse weight for most warehouses.
• 3.0 mil and up is built for heavy or recycled-content boxes that need extra holding power, including overstuffed cartons and corrugated that has lost some rigidity.

When to Reach for Reinforced or Specialty Tape

Some shipments need more than standard film tape. Water-activated reinforced gummed tape (the kind with fiberglass strands) bonds to the corrugated itself and creates a tamper-evident seal that is hard to peel back undetected, which is why it is popular for high-value or theft-prone goods. Filament tape, with its lengthwise glass fibers, is built for bundling, palletizing, and reinforcing seams under tension rather than sealing flaps. And for anyone running color-coded operations, custom color and printed tape lets you sort by department, flag fragile loads, or seal cartons with your logo as free advertising on every doorstep.

Three Habits That Make Any Tape Work Better

• Use the H-taping method on heavier cartons, sealing the center seam plus both edge seams so the flaps cannot bow open.
• Apply tape to clean, dry, dust-free boxes. Adhesive will not bond to a dusty surface, and most “tape failures” are really surface failures.
• Keep a quality dispenser in good condition. A dragging or dull blade tears tape and slows your line more than people realize.

Buying tape by the case in the right spec also keeps your per-roll cost down, which is where bulk ordering pays off. Not sure which weight or adhesive fits your line? We stock acrylic, hot melt, reinforced, filament, and custom printed options, and can spec it to your boxes. Browse the full range at our online shop or call us to talk it through.

Ready to get the right tape on your dock? Call KMS Distributing at (847) 630-7502, email orders@kmsdistributing.com, or browse 20,000+ packaging products at our online shop. We offer free Chicagoland delivery on orders over $1,000, and most in-stock orders placed before noon ship next business day.

If your carrier invoices keep climbing even though your products haven’t gotten any heavier, dimensional weight is probably the culprit. Carriers bill on whichever is greater: a package’s actual weight or its dimensional (DIM) weight, calculated from its size. Ship a lightweight product in an oversized box and you pay for air. Here’s how dimensional weight works and seven practical ways to stop overpaying for it.

How Dimensional Weight Is Calculated

Multiply your package’s length by width by height in inches, then divide by the carrier’s DIM divisor. Major carriers commonly use a divisor of 139 for standard shipments. A box measuring 18 x 14 x 12 inches comes to 3,024 cubic inches; divide by 139 and you get a billable weight of about 22 pounds, even if the contents weigh five. The carrier charges you for 22. That gap between actual and billable weight is money you can recover with smarter packaging.

7 Ways to Reduce DIM Weight Charges

1. Right-size your boxes. The single biggest lever. Every inch of empty space is billable air. Matching the carton to the product is where most of the savings live.
2. Order custom box sizes. When stock dimensions force you into a box that’s too big, a custom box built to your exact product dimensions eliminates the wasted volume for good.
3. Cut down on void fill. A smaller box needs less bubble, foam, or paper to fill it, so you save twice: on the cushioning material and on the DIM weight.
4. Use mailers and poly bags for soft goods. Apparel, textiles, and other non-fragile items don’t need a rigid box. A poly mailer collapses to the size of its contents and almost always bills at actual weight.
5. Keep a tighter range of box sizes. A well-chosen set of cartons lets packers pick the closest fit instead of defaulting to whatever oversized box is on the shelf.
6. Audit your most-shipped SKUs. Identify your top items by volume and optimize their packaging first. Small per-box savings multiply fast across thousands of shipments.
7. Flatten and fold where you can. Reducing any one dimension lowers the cubic total. Sometimes laying a product flat instead of standing it upright drops you into a lower billable tier.

Right-Sizing Pays Off Beyond Shipping

Smaller, well-fitted packaging doesn’t just cut DIM charges. It lowers material costs, speeds up packing, reduces product damage from shifting in transit, and trims storage space for your flattened carton inventory. For Chicagoland businesses shipping hundreds or thousands of parcels a month, dialing in box sizes is one of the highest-return packaging projects you can take on.

Not sure which sizes fit your products best? We stock a wide range of corrugated boxes and can quote custom sizes and bulk quantities to match exactly what you ship. Browse our full catalog of 20,000+ packaging products or call us to talk through your most-shipped items.

Ready to stop paying for air? Call KMS Distributing at (847) 630-7502, email orders@kmsdistributing.com, or browse 20,000+ products at kmsdistributors.com/Shop. We offer free Chicagoland delivery on orders over $1,000, and most in-stock orders placed before noon ship next business day.

You can pick the perfect box and the strongest tape, but if your pallet loads aren’t strapped correctly, product still arrives crushed, shifted, or scattered across a trailer floor. Strapping (also called banding) is the workhorse that holds palletized freight together through forklifts, dock drops, and long highway miles. Here’s a practical rundown of the strapping types, tools, and techniques that keep Chicagoland shipments intact.

The three main types of strapping

Most warehouses run one of three materials, and choosing the right one comes down to load weight and how much “give” you need.

• Polypropylene (PP) — The lightweight, economical choice for bundling, carton closing, and light unitizing. It stretches and recovers a little, which is fine for light to medium loads but not for anything heavy or sharp-cornered.
• Polyester (PET) — The strongest plastic strapping, with high retained tension. PET is the go-to replacement for steel on most palletized loads because it absorbs impact and keeps tension as the load settles.
• Steel — Reserved for the heaviest, rigid, sharp-edged, or high-temperature loads like coils, bar stock, and metal castings. It has almost no stretch, so it holds rigid freight tightly but can snap under sudden impact.

Match the strap to the load

Strapping is rated by width, thickness, and break strength. A common mistake is over-buying strength you don’t need, or worse, under-strapping a heavy pallet to save a few dollars. As a general guide: light bundling jobs do well with 3/8″ to 1/2″ polypropylene, medium pallet loads with 1/2″ to 5/8″ polyester, and heavy industrial freight with 5/8″ or wider polyester or steel. When in doubt, factor in load weight, edge sharpness, transit distance, and how much the load might settle in transit.

Don’t forget the tools and accessories

Strapping only works as well as the tools tensioning it. You’ll need a tensioner to pull the strap tight, a sealer or buckles (for steel and some PP), and either metal seals or a friction-weld/battery-powered tool for plastic strapping. Battery-powered combination tools tension and weld in one step and are a major time-saver for high-volume lines. Just as important are edge protectors, which spread strap tension across box corners so the band doesn’t cut into your cartons or product.

Strapping technique that actually holds

• Apply at least two straps per pallet, more for tall or unstable loads, and run them over the corners where the load is most likely to shift.
• Use edge protectors on every corner the strap crosses.
• Tension consistently. Too loose and the load shifts; too tight and you crush the product.
• Combine strapping with stretch film for unitizing. Film contains the load, strapping anchors it to the pallet.
• Inspect seals and welds. A bad joint is the most common failure point.

Stock it before you need it

Running out of strapping mid-shift stops your dock cold. That’s where a local supplier matters: KMS Distributing stocks polypropylene and polyester strapping, seals, buckles, tensioners, edge protectors, and the rest of your unitizing supplies for warehouses across Chicagoland. If your loads are unusual or high-volume, ask about bulk ordering to lock in pricing and keep your line stocked. You can also browse the full catalog of strapping and packaging gear in our online shop.

Need strapping, tools, or a full unitizing setup fast? Call KMS Distributing at (847) 630-7502, email orders@kmsdistributing.com, or browse 20,000+ products at our online shop. Enjoy free Chicagoland delivery on orders over $1,000, with most in-stock orders placed before noon arriving the next business day.

If your carrier invoices keep climbing even though your products haven’t gotten any heavier, dimensional weight is probably the culprit. Carriers bill on whichever is greater: a package’s actual weight or its dimensional (DIM) weight, calculated from its size. Ship a lightweight product in an oversized box and you pay for air. Here’s how dimensional weight works and seven practical ways to stop overpaying for it.

How Dimensional Weight Is Calculated

Multiply your package’s length by width by height in inches, then divide by the carrier’s DIM divisor. Major carriers commonly use a divisor of 139 for standard shipments. A box measuring 18 x 14 x 12 inches comes to 3,024 cubic inches; divide by 139 and you get a billable weight of about 22 pounds, even if the contents weigh five. The carrier charges you for 22. That gap between actual and billable weight is money you can recover with smarter packaging.

7 Ways to Reduce DIM Weight Charges

1. Right-size your boxes. The single biggest lever. Every inch of empty space is billable air. Matching the carton to the product is where most of the savings live.
2. Order custom box sizes. When stock dimensions force you into a box that’s too big, a custom box built to your exact product dimensions eliminates the wasted volume for good.
3. Cut down on void fill. A smaller box needs less bubble, foam, or paper to fill it, so you save twice: on the cushioning material and on the DIM weight.
4. Use mailers and poly bags for soft goods. Apparel, textiles, and other non-fragile items don’t need a rigid box. A poly mailer collapses to the size of its contents and almost always bills at actual weight.
5. Keep a tighter range of box sizes. A well-chosen set of cartons lets packers pick the closest fit instead of defaulting to whatever oversized box is on the shelf.
6. Audit your most-shipped SKUs. Identify your top items by volume and optimize their packaging first. Small per-box savings multiply fast across thousands of shipments.
7. Flatten and fold where you can. Reducing any one dimension lowers the cubic total. Sometimes laying a product flat instead of standing it upright drops you into a lower billable tier.

Right-Sizing Pays Off Beyond Shipping

Smaller, well-fitted packaging doesn’t just cut DIM charges. It lowers material costs, speeds up packing, reduces product damage from shifting in transit, and trims storage space for your flattened carton inventory. For Chicagoland businesses shipping hundreds or thousands of parcels a month, dialing in box sizes is one of the highest-return packaging projects you can take on.

Not sure which sizes fit your products best? We stock a wide range of corrugated boxes and can quote custom sizes and bulk quantities to match exactly what you ship. Browse our full catalog of 20,000+ packaging products or call us to talk through your most-shipped items.

Ready to stop paying for air? Call KMS Distributing at (847) 630-7502, email orders@kmsdistributing.com, or browse 20,000+ products at kmsdistributors.com/Shop. We offer free Chicagoland delivery on orders over $1,000, and most in-stock orders placed before noon ship next business day.

If your carrier invoices keep climbing even though your products haven’t gotten any heavier, dimensional weight is probably the culprit. Carriers bill on whichever is greater: a package’s actual weight or its dimensional (DIM) weight, calculated from its size. Ship a lightweight product in an oversized box and you pay for air. Here’s how dimensional weight works and seven practical ways to stop overpaying for it.

How Dimensional Weight Is Calculated

Multiply your package’s length by width by height in inches, then divide by the carrier’s DIM divisor. Major carriers commonly use a divisor of 139 for standard shipments. A box measuring 18 x 14 x 12 inches comes to 3,024 cubic inches; divide by 139 and you get a billable weight of about 22 pounds, even if the contents weigh five. The carrier charges you for 22. That gap between actual and billable weight is money you can recover with smarter packaging.

7 Ways to Reduce DIM Weight Charges

1. Right-size your boxes. The single biggest lever. Every inch of empty space is billable air. Matching the carton to the product is where most of the savings live.
2. Order custom box sizes. When stock dimensions force you into a box that’s too big, a custom box built to your exact product dimensions eliminates the wasted volume for good.
3. Cut down on void fill. A smaller box needs less bubble, foam, or paper to fill it, so you save twice: on the cushioning material and on the DIM weight.
4. Use mailers and poly bags for soft goods. Apparel, textiles, and other non-fragile items don’t need a rigid box. A poly mailer collapses to the size of its contents and almost always bills at actual weight.
5. Keep a tighter range of box sizes. A well-chosen set of cartons lets packers pick the closest fit instead of defaulting to whatever oversized box is on the shelf.
6. Audit your most-shipped SKUs. Identify your top items by volume and optimize their packaging first. Small per-box savings multiply fast across thousands of shipments.
7. Flatten and fold where you can. Reducing any one dimension lowers the cubic total. Sometimes laying a product flat instead of standing it upright drops you into a lower billable tier.

Right-Sizing Pays Off Beyond Shipping

Smaller, well-fitted packaging doesn’t just cut DIM charges. It lowers material costs, speeds up packing, reduces product damage from shifting in transit, and trims storage space for your flattened carton inventory. For Chicagoland businesses shipping hundreds or thousands of parcels a month, dialing in box sizes is one of the highest-return packaging projects you can take on.

Not sure which sizes fit your products best? We stock a wide range of corrugated boxes and can quote custom sizes and bulk quantities to match exactly what you ship. Browse our full catalog of 20,000+ packaging products or call us to talk through your most-shipped items.

Ready to stop paying for air? Call KMS Distributing at (847) 630-7502, email orders@kmsdistributing.com, or browse 20,000+ products at kmsdistributors.com/Shop. We offer free Chicagoland delivery on orders over $1,000, and most in-stock orders placed before noon ship next business day.

Choosing the wrong void fill is an easy way to either trash your products in transit or torch your margins on materials and shipping. Empty space inside a box lets contents shift, and shifting is what cracks, dents, and scuffs goods on the way to your Chicagoland customers. The three workhorses of void fill are bubble cushioning, foam, and paper. Each has a job it does well. Here is how to match the material to the shipment.

Bubble cushioning: the all-rounder

Bubble is the default for a reason. The trapped air gives you a springy buffer that absorbs shock, and it conforms loosely around odd shapes. It is light, so it adds almost nothing to your dimensional weight, and it is fast to apply once your packing station has a roll mounted within reach.

Reach for bubble when you are wrapping individual items that need surface protection, such as glassware, framed goods, electronics housings, or anything with a finish that scratches. Small-bubble grades cushion light items and fill thin gaps. Large-bubble grades handle bigger voids and heavier loads. The one downside is that loose bubble compresses over a long haul, so it is not your best pick when a box will be stacked under heavy weight for days.

Foam: maximum protection for fragile and high-value goods

Foam is what you use when the item absolutely cannot move and the cost of a damaged return dwarfs the cost of materials. Foam sheeting protects soft surfaces and finishes. Foam pouches slip over small components. Foam planks and corner pieces immobilize heavy or angular products inside a box. For repeat shipments of the same item, custom-cut foam inserts hold the product in a fixed cradle so it survives rough handling every time.

The trade-offs are cost and bulk. Foam runs more per shipment than bubble or paper, and it takes up storage space at your facility. Save it for electronics, instruments, medical devices, and anything fragile and expensive enough to justify the spend.

Paper: clean, recyclable gap fill

Kraft paper and crumpled void-fill paper shine at one job: filling empty space so contents do not slide. It is curbside recyclable, it presents well in an unboxing, and customers do not have to feel guilty throwing it out. Paired with a dispenser, paper packs gaps quickly and keeps a station tidy.

Paper is best for non-fragile or already-boxed items where you mainly need to take up slack, such as books, tools, bottled goods in their own packaging, or kitted orders. It offers less shock absorption than bubble or foam, so it is gap fill rather than true cushioning. For fragile items, combine a paper fill with a bubble wrap on the item itself.

How to choose at a glance

• Surface scratches a concern, light to medium weight: bubble cushioning.
• Fragile, high-value, or repeat shipments that must not shift: foam.
• Sturdy items that just need slack taken up, recyclability matters: paper.
• Genuinely fragile in a loose box: wrap the item in bubble, then fill remaining gaps with paper.

One more cost lever worth pulling: the less void you have to fill, the less you spend on material and the lower your dimensional weight. Right-sizing the box is the cheapest cushioning decision you can make. If stock sizes leave you packing fistfuls of fill into half-empty cartons, a tighter box pays for itself fast. That is where custom boxes and bulk orders come in, and our team can help you spec the right size and the right fill together so you are not over-buying either one.

Want to compare grades side by side? Browse bubble, foam, and paper void fill among our 20,000+ products at our online store, or call us and we will point you to the right material for what you ship.

Ready to dial in your packaging? Call KMS Distributing at (847) 630-7502, email orders@kmsdistributing.com, or browse 20,000+ products at www.kmsdistributors.com/Shop. Enjoy free Chicagoland delivery on orders over $1,000, with most in-stock orders placed before noon arriving the next business day.