---
type: guide
title: "Standard Envelope Sizes for Printing"
description: "Standard envelope sizes for printing explained: the #10 (4.125 x 9.5), #9, 6x9, 9x12, and A-series, with real dimensions and the mailer each one fits."
resource: https://www.4over4.com/guide/standard-envelope-sizes-for-printing
tags: ["guide"]
timestamp: 2026-07-20T18:54:40.856Z
---

# Standard Envelope Sizes for Printing

Standard envelope sizes for printing explained: the #10 (4.125 x 9.5), #9, 6x9, 9x12, and A-series, with real dimensions and the mailer each one fits.

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

- Page type: guide
- URL: https://www.4over4.com/guide/standard-envelope-sizes-for-printing