---
type: guide
title: "Postcard Stamp Size Guide with Rates, Rules and Placement"
description: "Postcard stamp size and USPS postage rules explained. Learn correct stamp placement, postcard dimensions, and current rates to mail without issues...."
resource: https://www.4over4.com/guide/stamp-size-on-postcard
tags: ["guide"]
timestamp: 2026-07-20T18:54:40.856Z
---

# Postcard Stamp Size Guide with Rates, Rules and Placement

Postcard stamp size and USPS postage rules explained. Learn correct stamp placement, postcard dimensions, and current rates to mail without issues....

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

- Page type: guide
- URL: https://www.4over4.com/guide/stamp-size-on-postcard