Inside dimensions
The usable space inside a box, listed length × width × depth. Box sizes are quoted by inside dimension.
In practice
Length is the longer side of the opening, width the shorter, depth the distance from opening to floor.
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Related terms
- Outside dimensions
- The box's outer size, which carriers measure for dimensional weight and which sets pallet patterns.
- Caliper
- The thickness of a sheet of board, usually given in inches or millimetres.
- Cushioning allowance
- The space added around a product inside the box for protective material.
Definitions written by Packgent, last reviewed 2026-10-27. All terms.