# Corrugated board

> Corrugated board combines one or more fluted paper layers with flat liners to create a lightweight structural sheet.

Canonical: https://dielinemaker.com/glossary/corrugated-board
Last updated: 2026-10-26

Materials

## What it means in packaging

The flute profile, liner papers and number of walls affect thickness and performance. A flute letter alone does not specify the complete board grade or prove that a box will protect a particular shipment.

## A practical example

An e-commerce mailer may use a fine flute for a compact fold, while a heavier shipping case needs a different board specification.

## What to check

Choose board from product weight, handling and testing requirements, then verify the finished pack with its contents.

## Use it in your project

- [Choose board, caliper and finishes](https://dielinemaker.com/learn/materials-and-finishes)
- [Shipping box template](https://dielinemaker.com/dielines/shipping-box)

## Related terms

- [Flute](https://dielinemaker.com/glossary/flute) — A flute is the wave-shaped paper layer within corrugated board; flute profiles describe its height and spacing.
- [Caliper](https://dielinemaker.com/glossary/caliper) — Caliper is the measured thickness of a sheet material, commonly expressed in millimetres or micrometres.
- [Mailer box](https://dielinemaker.com/glossary/mailer-box) — A mailer box is a packaging format commonly assembled from one blank with a hinged lid and interlocking walls or tabs.

## Related

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