---
type: faq
title: "What paper thickness qualifies for USPS postcard mailing?"
description: "USPS accepts postcards that measure between 0.007 and 0.016 inches thick. Both 14pt and 16pt cardstock sit comfortably inside that range, which is why they"
resource: https://www.4over4.com/faqs/postcards/what-paper-thickness-qualifies-for-usps-postcard-mailing
tags: ["Marketing Materials", "faq"]
timestamp: 2026-07-20T18:54:40.856Z
---

# What paper thickness qualifies for USPS postcard mailing?

USPS accepts postcards that measure between 0.007 and 0.016 inches thick. Both 14pt and 16pt cardstock sit comfortably inside that range, which is why they

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

- Page type: faq
- Hub: Marketing Materials
- URL: https://www.4over4.com/faqs/postcards/what-paper-thickness-qualifies-for-usps-postcard-mailing