# Mailer box

> A mailer box is a packaging format commonly assembled from one blank with a hinged lid and interlocking walls or tabs.

Canonical: https://dielinemaker.com/glossary/mailer-box
Last updated: 2026-10-26

Structures

## What it means in packaging

Mailer designs vary. Many use corrugated board and folded wall sections, but the name does not guarantee that a particular pack is suitable for shipping without an outer carton. Closure security and cushioning are separate decisions.

## A practical example

An apparel mailer can combine a hinged presentation lid with tissue, an insert and a shipping seal.

## What to check

Test packed fit and closure security through the intended handling conditions before relying on it as a shipper.

## Use it in your project

- [Mailer box template](https://dielinemaker.com/dielines/mailer-box)
- [Inside, outside and manufacturing dimensions](https://dielinemaker.com/learn/box-size-calculator)

## Related terms

- [Blank](https://dielinemaker.com/glossary/blank) — A blank is the flat piece of material cut to shape before it is folded or assembled into packaging.
- [Corrugated board](https://dielinemaker.com/glossary/corrugated-board) — Corrugated board combines one or more fluted paper layers with flat liners to create a lightweight structural sheet.
- [Outside dimensions](https://dielinemaker.com/glossary/outside-dimensions) — Outside dimensions describe the external envelope of an assembled package, including its material thickness.

## Related

- [Packaging glossary](https://dielinemaker.com/glossary)