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Cutting dimensional weight charges with right-sized boxes

May 11, 2026 · 4 min read · Custom Boxes Co. studio

Cutting dimensional weight charges with right-sized boxes

Dimensional weight converts a parcel's volume into a billable weight. If your box is bigger than the product needs, you are paying to ship air on every order.

Measure your ten best-selling products and group them into three or four size bands. Most catalogues collapse neatly into a small set of box sizes.

Removing 2cm from each dimension of a mid-size mailer can cut billed weight by a fifth, and it removes void fill from the pick line at the same time.

Custom sizing has a tooling cost, but it is a one-time charge amortised over every parcel you send afterwards.

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