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How right sized boxes cut your shipping costs

5 minute readUpdated November 2026

Couriers do not just charge for weight. They charge for space. A box that is a little too big costs you on every single order.

Dimensional weight in one paragraph

Couriers calculate a dimensional (or volumetric) weight from the box size and bill whichever is higher: the actual weight or the dimensional weight. A light product in a big box gets billed as if it were heavy. Each carrier uses its own formula, so check your rate card, but the lesson is the same everywhere: smaller boxes cost less to ship.

Where the money goes

  • Higher dimensional weight charges on oversized boxes.
  • Void fill (paper, air pillows, bubble wrap) and the time to add it.
  • Damage and returns when products move around inside the box.
  • Storage space for boxes that are bigger than they need to be.

How to right size

  1. List your top products and order combinations by volume.
  2. Measure each product at its widest points.
  3. Group them into two to four box sizes that fit with little spare room.
  4. Add simple inserts for fragile or oddly shaped items.

Send us your product list and we will suggest a set of sizes. The savings on freight usually cover the custom boxes.

Ready for a price? Send us your box size and quantity and we will reply with options and a production date.

Send us your box size.
We will send you a price.

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