Corrugated Dividers, Pads, and Partitions: How to Ship Multiple Items Without Breakage

When a box holds more than one item, the biggest risk is usually not the drop from the conveyor or the bump on the truck. It is the items inside hitting each other. Glass jars chip, bottles crack at the neck, and finished parts scuff. Corrugated dividers, pads, and partitions solve that problem by giving every item its own space, and they often do it with less material and less labor than wrapping each piece individually.

Here is how each component works, when to use it, and how to size it so your multi-item shipments arrive in the same condition they left your dock.

1. Corrugated Pads: The Simplest Layer of Protection

Pads are flat sheets of corrugated board cut to the inside dimensions of a box. They look basic, but they do a lot of work:

• Layer separation. Place a pad between tiers of product so the top layer does not rest directly on the one below.
• Top and bottom reinforcement. A pad on the bottom adds puncture resistance, and a pad on top gives the tape and flaps a flat surface to press against.
• Pallet tier sheets. Larger pads between pallet layers spread weight evenly and keep cases from nesting into the gaps below.
• Box liners. A pad along one wall protects against box cutters when the carton is opened.

Pads are usually the lowest-cost upgrade you can make to an existing box. If you already have a good carton size, adding pads is often enough to cut damage on stacked product.

2. Partitions: A Dedicated Cell for Every Item

Partitions (also called cell dividers or egg-crate inserts) are slotted strips of corrugated or chipboard that interlock to form a grid. Each item sits in its own cell, so nothing touches its neighbor. They are the standard choice for:

• Glass bottles, jars, and vials
• Candles, cosmetics, and other retail units shipped in cases
• Machined parts or components that scratch easily
• Lab, food service, and beverage products shipped by the dozen

Partitions are described by their grid, such as 2×3 for six cells, 3×4 for twelve cells, or 4×6 for twenty-four cells. Height matters too. For tall, narrow items like bottles, a partition that reaches at least two-thirds of the product height keeps the item from tipping and hitting the wall of its cell.

3. Dividers and Die-Cut Inserts: When a Grid Is Not Enough

Not every product fits a uniform grid. A kit might include one large item and several small ones, or a product might have an irregular shape. In those cases, a simple single divider or a die-cut insert works better:

• Single or scored dividers split a box into two or three sections, which is useful for kits and mixed orders.
• Die-cut inserts are cut to hold a specific product shape, so the item locks into place and cannot shift.
• Folded inserts create a raised platform or cradle, keeping a product centered away from the box walls.

Die-cut inserts cost more upfront because they require tooling, but on repeat orders they can replace bubble wrap, void fill, and the labor to apply it. For products you ship every week, that tradeoff often favors the insert.

4. How to Size Dividers and Partitions Correctly

Most packaging problems with partitions come from sizing. Keep these points in mind:

• Start with the product, not the box. Measure the largest dimension of each item, including caps, handles, or labels that stick out.
• Allow a small clearance. Cells that are too tight make packing slow and can stress glass. Cells that are too loose let items rattle.
• Account for board thickness. Each partition wall takes up space. A 3×4 grid has several walls running each direction, and that adds up.
• Size the box to the partition. Once you know the assembled partition footprint, pick a box whose inside dimensions match it closely. Our guide on how to measure a box correctly walks through inside dimensions step by step.

5. Choosing the Right Material

Partitions and pads come in several materials, and the right one depends on product weight and fragility:

• Chipboard is thin and economical, and it works well for light items that mostly need scuff protection.
• Single-wall corrugated is the most common choice for bottles, jars, and moderately heavy parts.
• Double-wall corrugated suits heavy items or cases that will be stacked high in a warehouse.
• Anti-static or foam-lined options are available for electronics and sensitive components.

6. When to Go Custom

Stock partitions and pads cover a lot of common sizes, but if your product falls between standard dimensions, you end up filling the gaps with extra void fill or accepting more movement than you want. That is when a custom set makes sense. A matched box, partition, and pad combination built for your product speeds up packing, uses less filler, and gives you a consistent pack-out every time.

KMS Distributing quotes custom boxes, inserts, and bulk orders by phone. Send us your product dimensions and quantities, and we will recommend a partition layout and board grade to match. You can also browse stock boxes, pads, and cushioning in our online catalog.

Local Supply for Chicagoland Shippers

From our location at 15 E Palatine Rd, Suite 103, in Prospect Heights, we supply businesses across the Chicago area with corrugated boxes, pads, partitions, tape, and cushioning. Most in-stock orders placed before noon deliver the next business day, and orders over $1,000 ship free anywhere in Chicagoland, so you can keep your packing stations stocked without holding months of inventory.

Need dividers, pads, or partitions for your next shipment? Call KMS Distributing at (847) 630-7502, email orders@kmsdistributing.com, or browse 20,000+ packaging products at kmsdistributors.com/Shop. Free Chicagoland delivery on orders over $1,000.