---
type: guide
title: "Standard Postcard Sizes in Inches, Millimeters, and Pixels"
description: "Standard postcard sizes in inches, millimeters and pixels, USPS mailing dimensions, and how to pick the right size, then print postcards at 4OVER4."
resource: https://www.4over4.com/guide/standard-postcard-sizes-and-dimensions-guide
tags: ["guide"]
timestamp: 2026-08-08T21:25:50.722Z
---

# Standard Postcard Sizes in Inches, Millimeters, and Pixels

Standard postcard sizes in inches, millimeters and pixels, USPS mailing dimensions, and how to pick the right size, then print postcards at 4OVER4.

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

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