---
type: guide
title: "Birthday Card Dimensions and the Envelopes They Actually Fit"
description: "The four birthday card sizes worth printing, the flat file each one needs, the envelope it fits, and the shape that adds a postage surcharge to every piece."
resource: https://www.4over4.com/guide/birthday-card-dimensions-the-complete-guide
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/birthday-card-dimensions-the-complete-guide
    title: "Birthday Card Dimensions and the Envelopes They Actually Fit"
status: stable
---

# Birthday Card Dimensions and the Envelopes They Actually Fit

The four birthday card sizes worth printing, the flat file each one needs, the envelope it fits, and the shape that adds a postage surcharge to every piece.

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

- Page type: guide
- URL: https://www.4over4.com/guide/birthday-card-dimensions-the-complete-guide