---
type: guide
title: "What Size Are Postcards? Standard Dimensions Explained"
description: "What size are postcards? Learn standard sizes from 4x6 to 6x11, USPS mailing requirements, and how to pick the right dimensions. Compare options now."
resource: https://www.4over4.com/guide/postcard-sizes-and-dimensions-complete-guide
tags: ["guide"]
timestamp: 2026-07-20T18:54:40.856Z
---

# What Size Are Postcards? Standard Dimensions Explained

What size are postcards? Learn standard sizes from 4x6 to 6x11, USPS mailing requirements, and how to pick the right dimensions. Compare options now.

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

- Page type: guide
- URL: https://www.4over4.com/guide/postcard-sizes-and-dimensions-complete-guide