If you have stored office documents, folders, or files, you can identify banker boxes.
They are strong, collapsible file storage boxes that are used in offices, homes, schools, and warehouses. Why? Because of their stackable design and convenient features like handles.
Not every Banker’s Box is identical, though. The sizes may vary depending on the nature of the files they carry or the required intensity. For this reason, you should have the correct dimensions of the Banker’s Box to decide on the appropriate box for your area and requirements.
Trying to figure out bankers box dimensions?
Standard banker’s box measures 15″ × 12″ × 10″ (38 cm × 30.4 cm × 25.4 cm, or 380 mm × 304 mm × 254 mm). This size holds letter-size and legal-size files upright without bending, folding, or crushing the edges.
Furthermore, there are exactly seven common formats you’ll see in bankers boxes. This is where this definitive guide will provide you with a proper understanding in a comprehensive and accurate way.
In this guide, you will learn about:
- Standard, legal, letter, A4, A5, basic-duty, and heavy-duty box formats
- Their defined internal and external measurements.
- A chart that lists every common banker’s box size in inches, centimeters, and millimeters.
So let’s dive in to learn which size is perfect for your business needs.
TLDR: Banker’s Box Size Chart (In, cm, mm)
Dimension order varies by manufacturer.
Letter and legal boxes are commonly listed as length × width × height, while storage models such as the Stor/File™ series are listed as width × depth × height.
| Box type | Inches | Centimeters | Millimeters |
| Standard | 15″ × 12″ × 10″ | 38 × 30.4 × 25.4 cm | 380 × 304 × 254 mm |
| Legal | 10″ × 15″ × 24″ | 25.4 × 38 × 60.9 cm | 254 × 380 × 609 mm |
| Letter | 10″ × 12″ × 15″ | 25.4 × 30.4 × 38 cm | 254 × 304 × 380 mm |
| A4 | 12″ × 14.9″ × 11.2″ | 30.4 × 37.8 × 28.4 cm | 304 × 378 × 284 mm |
| A5 | 7″ × 12″ × 10″ | 17.7 × 30.4 × 25.4 cm | 177 × 304 × 254 mm |
| Basic-duty (internal) | 12″ × 15″ × 10″ | 38 × 30.5 × 25.4 cm | 305 × 381 × 254 mm |
| Heavy-duty (internal) | 15″ × 12″ × 10″ | 33.3 × 38 × 28.5 cm | 305 × 381 × 254 mm |
Custom orders through The Premier Packaging can adjust any of these dimensions to a specific document volume.
Why Bankers Box Dimensions Matter
Standardized bankers box dimensions optimize storage space, cap weight to prevent lifting injuries, and ensure compatibility with office shelving and filing systems. Choosing the correct box size helps with:
- Protecting documents
- Efficient use of space
- Faster retrieval
- Safer stacking
- Logistics
- Ergonomics and load control
Large boxes can take up a lot of space, likely leading to waste, whereas small boxes can damage files. It is therefore always important to ensure you know the right dimensions for banker boxes before purchasing them in large quantities.
Standard Bankers Box Dimensions
The standard bankers box measures 15″ × 12″ × 10″ and is the most widely used banker box size across the United States. In centimeters, the standard bankers box is 38 cm × 30.4 cm × 25.4 cm. In millimeters, it is 380 mm × 304 mm × 254 mm. Standard archival boxes use these dimensions by default, and custom orders can vary them to fit specific needs.
| Inches | Centimeters | Millimeters |
| 15″ × 12″ × 10″ | 38 × 30.4 × 25.4 cm | 380 × 304 × 254 mm |
Legal-Size Bankers Box Dimensions
Legal-size bankers boxes store legal documents, letters, and case files, and are standard in law firms that separate legal records from general records. The legal-size bankers box measures 10″ × 15″ × 24″ in inches, 25.4 cm × 38 cm × 60.9 cm in centimeters, and 254 mm × 380 mm × 609 mm in millimeters. Depth can change with the number of pages stored.
| Inches | Centimeters | Millimeters |
| 10″ × 15″ × 24″ | 25.4 × 38 × 60.9 cm | 254 × 380 × 609 mm |
Letter-Size Bankers Box Dimensions
Letter-size bankers boxes hold standard 8.5″ × 11″ letter paper. The letter-size bankers box measures 10″ × 12″ × 15″ in inches, 25.4 cm × 30.4 cm × 38 cm in centimeters, and 254 mm × 304 mm × 380 mm in millimeters. Height is the most commonly customized dimension: businesses with lower document volumes often reduce the 15″ height to 10″.
| Inches | Centimeters | Millimeters |
| 10″ × 12″ × 15″ | 25.4 × 30.4 × 38 cm | 254 × 304 × 380 mm |
A4 Bankers Box Dimensions
A4 documents (210 mm × 297 mm) do not fit letter-size or legal-size boxes because A4 paper differs slightly in width and length. The A4 bankers box has dimensions of 12″ × 14.9″ × 11.2″ in inches, 30.4 cm × 37.8 cm × 28.4 cm in centimeters, and 304 mm × 378 mm × 284 mm in millimeters. Length and width stay fixed to protect the pages; depth varies with page count.
| Inches | Centimeters | Millimeters |
| 12″ × 14.9″ × 11.2″ | 30.4 × 37.8 × 28.4 cm | 304 × 378 × 284 mm |
A5 Bankers Box Dimensions
A5 bankers boxes store A5 documents (148 mm × 210 mm). The A5 bankers box measures 7″ × 12″ × 10″ in inches, 17.7 cm × 30.4 cm × 25.4 cm in centimeters, and 177 mm × 304 mm × 254 mm in millimeters.
| Inches | Centimeters | Millimeters |
| 7″ × 12″ × 10″ | 17.7 × 30.4 × 25.4 cm | 177 × 304 × 254 mm |
Basic-Duty Bankers Box Dimensions
The basic-duty bankers box, such as the Stor/File™ 703, has an internal storage size of 12″ W × 15″ D × 10″ H and an external size of 12.5″ W × 16.3″ D × 10.5″ H including the lift-off lid. In centimeters, the internal dimensions are approximately 38.0 cm × 30.5 cm × 25.4 cm. In millimeters, the internal dimensions are 305 mm × 381 mm × 254 mm and the external dimensions are 318 mm × 413 mm × 267 mm. The basic-duty box fits standard letter-size and legal-size files, uses a built-in lift-off lid, and provides a stacking strength of up to 450 lbs.
Heavy-Duty Bankers Box Dimensions
Heavy-duty bankers boxes vary in size by model. The most common heavy-duty size is 15″ × 12″ × 10″ for letter and legal paper. Heavy-duty boxes for combined letter and legal files measure 15″ × 24″ × 10″, and heavy-duty plastic models with rails measure 17.38″ × 14.19″ × 10.63″. A common heavy-duty exterior measures 61.3 cm × 38.4 cm × 26.4 cm, while A4/Foolscap interiors measure about 33.3 cm × 38 cm × 28.5 cm. In millimeters, the common internal size is 305 mm × 381 mm × 254 mm, and the larger A4/Foolscap size is 333 mm × 390 mm × 285 mm. Heavy-duty models use double-thickness corrugated cardboard, so external dimensions typically run 20 mm to 30 mm larger per side.
How to Calculate Bankers Box Dimensions
Bankers box dimensions equal length × width × depth (height).
- Length is the horizontal measurement;
- Height or depth is the vertical measurement.
- Depth determines how many stacked pages a box holds.
Measure the length and width of the documents to be stored, then select a depth that matches the page volume.
Order Bankers Boxes in Bulk
The Premier Packaging makes and manufactures banker’s boxes from high-grade Kraft, cardboard, and corrugated materials. We provide free design support, free 3D mockups, free custom quotes, a low minimum order quantity of 50 boxes, and free shipping within the US. Contact us for pricing and specifications.
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