Custom Corrugated Box Dividers Made to Your Box Size

What are corrugated box dividers?

They are flat strips of corrugated board with slots cut along them. Each strip locks into the strips running across it.

Once slotted together, the strips make a grid that stands upright inside a carton. Every product gets its own cell.

Grids can be a few cells or a few dozen. We can also cut a punched holder with round holes for small vials.

Which divider layout fits my products?

The right layout depends on what you pack and how it is shaped. This table lists the options we cut most often.

How do I measure for box dividers?

Begin with the inside length, width and height of the carton. If we are making the box too, we size both at once.

Next, measure the widest part of one product. Add about 1/8 in so each item drops in without forcing.

Count the board between cells. A row of four cells has three inner walls, so B flute adds roughly 3/8 in to the row.

Our guide to measuring a box from the inside shows where to place the tape.

Which flute should the dividers use?

Sample bottles and light parts work well in E flute, about 1/16 in thick. It is slim, so cells stay roomy.

Jars and standard bottles do better in B flute (about 1/8 in) or C flute (about 5/32 in). The walls are firmer and resist bending.

Heavy bottles, such as wine, suit BC double wall at about 1/4 in. It cushions as well as separates, and it pairs nicely with a double wall outer carton.

The dividers do not need to match the outer box. Single wall grids inside a double wall carton are a common mix.

Not sure? Send a photo and the weight of one item. We will suggest a flute in your quote.

Should I print on my dividers?

Most buyers leave dividers plain kraft, since they sit out of sight and exist to protect.

Printing makes sense when the grid is visible on opening, such as a gift set or a tasting kit. We print one color, two color or full color CMYK, and white board gives a clean backdrop.

Lamination, foil and similar finishes are rarely worth it here. Put that budget into the outer carton, for example custom printed boxes.

A small printed number in each cell is a handy middle path. It helps packers fill mixed sets in the right order.

How do I pack a divider grid?

Slot the grid together on a flat table, then lower it into the carton as one piece. Building it inside the box often bends a strip.

Fill the corner cells with the heaviest items first. That keeps the carton balanced while you work toward the center.

Tape one filled example near the packing station. New hires can copy it without asking questions.

If a bottle neck rises above the grid, wrap it with a sheet of paper. Close the box and give it a gentle shake to listen for rattles.

Can I order dividers without boxes?

Yes. If you already stock cartons, send the inside size and we will cut grids to match.

Measure two or three cartons from different lots. Sizes can drift slightly between runs, and the grid should fit the tightest one.

Plenty of customers order both together because it removes guesswork. A carton with a built-in grid is also a smart way to ship sets, and mailer boxes with fitted inserts cover that style.

How do dividers protect glass?

Most bottle breakage starts when glass strikes glass. A divider wall between neighbors stops that contact.

Corrugated board also flexes a little. When the carton takes a bump, the flutes absorb part of the knock.

The grid braces the side walls too. A full carton holds its shape better when stacked under others in a standard shipping box run.

For extra safety, lay a sheet of board under the grid at the base.