---
type: faq
title: "What size is an A10 envelope?"
description: "An A10 envelope measures 6 x 9 1/2 inches, with the flap on the longer 9 1/2 inch side. A10 is the largest of the standard A-series invitation envelopes. I"
resource: https://www.4over4.com/faqs/business-stationery/what-size-is-an-a10-envelope
tags: ["Business Stationery", "faq"]
timestamp: 2026-07-20T18:54:40.856Z
---

# What size is an A10 envelope?

An A10 envelope measures 6 x 9 1/2 inches, with the flap on the longer 9 1/2 inch side. A10 is the largest of the standard A-series invitation envelopes. I

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/what-size-is-an-a10-envelope