---
type: guide
title: "What Size Is an A7 Envelope and What Fits Inside It?"
description: "What size is an A7 envelope? Get the exact dimensions, the card sizes it holds like 5x7 invitations, mailing rules, and how it compares to A6 and A9 formats."
resource: https://www.4over4.com/guide/what-size-is-an-a7-envelope
tags: ["guide"]
timestamp: 2026-08-08T21:25:50.722Z
---

# What Size Is an A7 Envelope and What Fits Inside It?

What size is an A7 envelope? Get the exact dimensions, the card sizes it holds like 5x7 invitations, mailing rules, and how it compares to A6 and A9 formats.

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

- Page type: guide
- URL: https://www.4over4.com/guide/what-size-is-an-a7-envelope