How to Measure for a Custom Box

We recommend adding a quarter inch to your internal measurements so your products slide into the box without catching.

Packaging Specs: How to Measure for a Custom Box

Ordering custom printed mailer boxes for your e-commerce brand is a massive step forward in your marketing. However, if you measure your product incorrectly, you will end up with thousands of beautiful boxes that your product simply cannot fit inside. Knowing exactly how the packaging industry measures boxes will save you from a costly mistake.

The Rules of Measurement

Box dimensions follow a very strict, universal format.

  • The Order: You must always measure in this exact order: Length by Width by Depth (L x W x D).
  • The Critical Detail: In the commercial packaging industry, these measurements are always based on the INSIDE of the box, not the outside dimensions. This ensures your product has enough actual physical volume to sit inside.

The Raven32 Recommendation

A box that is too tight is incredibly frustrating for your fulfillment team to pack. As printing and promotional experts, we strongly recommend adding a quarter inch to your exact internal measurements. This tiny bit of breathing room ensures your products slide into the box smoothly without catching or tearing the cardboard. Reach out today to engineer your perfect custom packaging.

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