Finding the Right Bankers Box Size: It's Not One-Size-Fits-All

When I took over purchasing in 2020 for a mid-sized law firm, I made a classic rookie mistake. I ordered a pallet of what I thought were standard Bankers Boxes. Turns out, 'standard' doesn't mean 'universal.' I ended up with hundreds of boxes that were either too small for our legal files or too large for our archiving needs, wasting about $400 on returns and replacement shipping.

That experience taught me something I tell every new office manager I meet: there is no single 'best' Bankers Box size. The right choice depends entirely on what you're storing and how you plan to use it. Let me break this down into three common scenarios.

Scenario A: The 'Archive and Forget' Standard

This is the most common scenario. You have standard letter or legal-size documents that need to be stored for 3-7 years for compliance or tax purposes. You'll probably never open these boxes again until it's time to shred them.

For this, the classic Bankers Box STOR/FILE is your best bet. It's the one you see in every office supply catalog. The exterior dimensions are roughly 15 x 12 x 10 inches. That's the 'what size is a bankers box' everyone asks about. The key here is that it's a 'true' archival box—it has a separate lid and a strong string-and-button closure.

I learned this the hard way. In my second year, I bought a cheaper, one-piece folding box to save $0.80 per unit. Saving $80 on an order of 100 boxes. But when we needed to retrieve a contract for an audit two years later, half the boxes had collapsed under the weight of the files stacked on top. The re-archiving cost us $400 in labor and materials. The 'penny wise, pound foolish' choice looked smart until the problem emerged.

Scenario B: The 'Frequent Access' File

This scenario is different. You're storing active project files, or documents that legal or accounting might need to pull with a week's notice. You don't want a box with a fiddly string closure that's a pain to open and reseal.

Here, you should look at the Bankers Box FELDON or the STARDEON models. These use a 'true fit' cover that snaps on and off more easily. The sizing is similar to the STOR/FILE, but the design is optimized for access, not just long-term storage.

The assumption is that all Bankers Boxes are the same because they're all cardboard. The reality is the closure mechanism changes the whole workflow. A box that's a pain to open means your team will avoid using it, and documents end up in messy piles on desks. I've seen this exact communication failure happen between an admin team and a legal department. The lawyers complained the boxes were 'too hard to open,' so they stopped using them. The problem wasn't the storage—it was the box type.

Scenario C: The 'Odd-Sized' Problem

This is where it gets tricky. You have oversized blueprints, thick reference manuals, or that stack of 12x18 inch marketing folders that don't fit in anything standard.

For these, don't force them into a standard box. The Bankers Box product line includes the FELDON 'Deep' or the STARDEON 'Expanding' models. These have a larger depth to accommodate unusual sizes. You can also find specific 'legal-width' versions of the standard boxes.

I'm not 100% sure of the exact model numbers for every variant—the product line changes slightly each year—but the key is to look for 'deep' or 'legal' in the product name when you're searching. The worst thing you can do is cram a document into a box that's too small. The corners get bent, the box bulges, and it won't stack properly. That single mangled box can mess up an entire row of shelving.

How to Know Which Scenario You're In

Before you place an order, ask yourself these three questions:

1. How often will I open this box? If the answer is 'maybe once in the next 5 years,' go with Scenario A. If it's 'monthly,' go with Scenario B.
2. What's the biggest document I'm storing? Measure the longest dimension. If it's over 11 inches, you're likely in Scenario C.
3. Who is using the box? Is it you, or a busy partner who doesn't want to fiddle with a string? That person's frustration is a real cost you should factor in.

Don't get me wrong—I order Bankers Boxes from Staples all the time, and a 'Standard Bankers Box' is a good product for 80% of what I need. But that other 20% will cost you time, money, and a lot of headaches if you don't think through the scenario first. As of January 2025, the pricing for a standard STOR/FILE is about $12-18 per box depending on quantity. The deep versions are about $14-22. That premium of a few dollars is often the cheapest insurance you'll buy for a clean, functional archive.