Outer flap
The flap that folds last and forms the outside of the closure. On slotted boxes the outer flaps sit on the length panels.
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Related terms
- Inner flap
- The flap that folds in first. On slotted boxes the inner flaps sit on the width panels.
- Flap
- A part of the blank hinged on a score that folds over to close the top or bottom of a box.
- Full overlap (FOL)
- A slotted box whose outer flaps are as long as the box is wide, so they overlap completely when closed.
Definitions written by Packgent, last reviewed 2026-10-27. All terms.