What Is a Bankers Box? Bankers Box Dimensions in Inches, Postage Costs, and Print Questions

I'm the quality and brand compliance manager at a records storage supply company. I review roughly 200 unique products a year before they go out the door. If a dimension is off, someone's order doesn't fit the shelving. If a print file is wrong, someone's marketing material is trash. These are the questions I see in search logs and email inboxes.

• What is a bankers box?
• Bankers box dimensions in inches
• Can I use a free poster design for an Among Us bookmark?
• How much does it cost to mail a 6x9 envelope?

What is a bankers box?

A bankers box is a corrugated cardboard records storage box with a separate lid. The design has a flat top, hand holes on the sides, and a label area on the end. The name comes from the Bankers Box brand, which is now part of Fellowes, and it became the generic name for this style of box. The same thing happened with Kleenex.

It is not a safe, not a humidity-controlled vault, and not a shipping container. It is a shelf box. It works well when you have folders of paper in a dry, steady environment. If you need to move records across town, put them in a plastic tote or a double-wall shipping carton.

Bankers box dimensions in inches: the short answer

The most common bankers box is 15 inches wide, 12 inches deep, and 10 inches high, measured on the outside. That's why you'll hear 15 by 12 by 10 in records storage specs. The same footprint comes in deeper versions—one popular model is 15 x 12 x 15—and the height is the dimension you should confirm before buying.

Inside, the usable width is closer to 14 3/4 inches because the corrugated walls and the lid take up room. I learned that in a Q1 2024 audit after receiving a batch that looked right on the outside but was 1/4 inch short inside. The vendor called it within industry standard. We rejected the batch and switched suppliers. At a 50,000-unit order, a quarter-inch error creates a lot of jammed file drawers.

Legal-size and hanging-file bankers box dimensions

For legal-size paper, the outside dimensions don't tell you everything. Legal folders are 8 1/2 x 14 inches, so the inside length must be at least 14 1/2 inches. A standard 15 x 12 x 10 box usually works, but check, because some imported boxes cut corners.

Hanging files add another spec: reinforced rails. Standard bankers boxes are not all made for hanging files. If you need hanging file rails, look for a model that explicitly says hanging file or with rails.

Can I use a free poster design for an Among Us bookmark?

You can, but check the pixels before you hit print. A free poster design can be fine if it's a PDF with bleed and the graphics are 300 DPI. Most free design tools, though, export at 72 DPI. That's fine for screens and terrible for paper.

A bookmark is only about 2 x 6 inches. At 300 DPI, the artwork needs to be at least 600 x 1800 pixels. If you start with a 72 DPI image, you're working with roughly 144 x 432 pixels. It looks okay on a phone and muddy in your hand.

We had a custom Among Us bookmark order come back with colors that didn't match and soft character edges. The shop rebuilt the file at 300 DPI and matched the two main colors to Pantone chips. Cost an extra $400 and a week, but the second run was worth it. That's the difference between a screen proof and a printed proof.

How much does it cost to mail a 6x9 envelope?

It costs the same as a standard letter if the envelope is flexible and no more than 1/4 inch thick. A 6x9 envelope is not automatically a large envelope. USPS letter limits are 3 1/2 to 6 1/8 inches high, 5 to 11 1/2 inches long, and up to 1/4 inch thick. A 6x9 fits within those.

As of the July 2024 USPS rate tables, one Forever stamp covered the first ounce, and a Forever stamp was 73 cents. If the envelope is heavier, rigid, or padded, the mailing class changes. You could be paying flat or parcel rates, and those jump quickly. USPS changes rates often, so check current prices at usps.com before you drop it in the box.

USPS letter dimension check: 3.5 in to 6.125 in high, 5 in to 11.5 in long, max 0.25 in thick.

Why do bankers boxes ship flat?

Because the flat footprint is the whole point. A folded box takes up less warehouse space and costs less to ship. When you fold it up, the walls get a crease at the bottom. I've had customers call that a defect. It's normal. The lid hides it when it's closed.

Can I stack bankers boxes or ship them?

Stacking is fine; that's what they're designed for. The corrugated construction is strong vertically, and a solid stack with a lid holds a surprising amount of weight.

Shipping is a different story. Hand holes and a loose lid are weak points. We tested a standard bankers box through a courier once. It showed up with two corners crushed and the lid peeled back. The files inside were fine, but the box was done. Use a shipping carton for anything that goes through a conveyor.

Are plastic bankers boxes better than cardboard ones?

I can only speak to what I inspect. Cardboard has worked for us in climate-controlled offices and archive rooms. Plastic makes sense if you have moisture problems or need something that can survive years of handling.

The catch is dimensions. A generic plastic tote that says bankers box size can measure 14.75 inches outside, not 15. If you're stacking columns on standard shelves, half an inch matters. We standardized on cardboard for regular file storage and plastic only for warehouse overflow. That setup is not the right answer for everyone, but it's been reliable for us.