---
type: faq
title: "What are the USPS mailing limitations for postcards?"
description: "USPS sorts mail into size bands, and those bands decide whether a card mails at the lower postcard rate or at letter and flat rates. Staying inside the pos"
resource: https://www.4over4.com/faqs/packaging-labels/what-are-the-usps-mailing-limitations-for-postcards
tags: ["Packaging & Labels", "faq"]
timestamp: 2026-07-20T18:54:40.856Z
---

# What are the USPS mailing limitations for postcards?

USPS sorts mail into size bands, and those bands decide whether a card mails at the lower postcard rate or at letter and flat rates. Staying inside the pos

Part of the **Packaging & Labels** hub. See [all faq concepts](index.md).

- Page type: faq
- Hub: Packaging & Labels
- URL: https://www.4over4.com/faqs/packaging-labels/what-are-the-usps-mailing-limitations-for-postcards