---
type: guide
title: "Custom Bubble Mailers, Kraft Options and the Size Numbers Explained"
description: "Bubble mailer sizes from #000 to #7, what kraft actually recycles, when poly is the better call, and the cheapest honest way to brand a padded mailer."
resource: https://www.4over4.com/guide/custom-bubble-mailers-explained-sizes-kraft-options-and-branding
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/custom-bubble-mailers-explained-sizes-kraft-options-and-branding
    title: "Custom Bubble Mailers, Kraft Options and the Size Numbers Explained"
status: stable
---

# Custom Bubble Mailers, Kraft Options and the Size Numbers Explained

Bubble mailer sizes from #000 to #7, what kraft actually recycles, when poly is the better call, and the cheapest honest way to brand a padded mailer.

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

- Page type: guide
- URL: https://www.4over4.com/guide/custom-bubble-mailers-explained-sizes-kraft-options-and-branding