---
type: faq
title: "What are the size and shape restrictions for mailing custom die-cut postcards?"
description: "The U.S. Postal Service sets both size limits and shape requirements for mail, and custom die-cut postcards face stricter scrutiny than standard rectangula"
resource: https://www.4over4.com/faqs/shape/what-are-the-size-and-shape-restrictions-for-mailing-custom-die-cut-postcards
tags: ["Shape", "faq"]
timestamp: 2026-07-20T18:54:40.856Z
---

# What are the size and shape restrictions for mailing custom die-cut postcards?

The U.S. Postal Service sets both size limits and shape requirements for mail, and custom die-cut postcards face stricter scrutiny than standard rectangula

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

- Page type: faq
- Hub: Shape
- URL: https://www.4over4.com/faqs/shape/what-are-the-size-and-shape-restrictions-for-mailing-custom-die-cut-postcards