---
type: faq
title: "How big is a number 10 envelope?"
description: "A number 10 envelope, written as #10, is the standard size for business letters and the most common envelope in offices. Dimension Measurement Height 4 1/8"
resource: https://www.4over4.com/faqs/business-stationery/how-big-is-a-number-10-envelope
tags: ["Business Stationery", "faq"]
timestamp: 2026-07-20T18:54:40.856Z
---

# How big is a number 10 envelope?

A number 10 envelope, written as #10, is the standard size for business letters and the most common envelope in offices. Dimension Measurement Height 4 1/8

Part of the **Business Stationery** hub. See [all faq concepts](index.md).

- Page type: faq
- Hub: Business Stationery
- URL: https://www.4over4.com/faqs/business-stationery/how-big-is-a-number-10-envelope