---
type: guide
title: "How to Choose Custom Rigid Mailers That Arrive Flat and Unbent"
description: "When a rigid mailer beats a poly bag, how to size one so the carrier does not bill you for air, and what printing on kraft board does to your colors."
resource: https://www.4over4.com/guide/how-to-choose-custom-rigid-mailers
tags: ["guide"]
generated:
  by: "process:4over4-mapp-build"
  at: 2026-09-08T01:19:44.025Z
timestamp: 2026-09-08T01:19:44.025Z
sources:
  - resource: https://www.4over4.com/guide/how-to-choose-custom-rigid-mailers
    title: "How to Choose Custom Rigid Mailers That Arrive Flat and Unbent"
status: stable
---

# How to Choose Custom Rigid Mailers That Arrive Flat and Unbent

When a rigid mailer beats a poly bag, how to size one so the carrier does not bill you for air, and what printing on kraft board does to your colors.

See [all guide concepts](index.md).

- Page type: guide
- URL: https://www.4over4.com/guide/how-to-choose-custom-rigid-mailers