---
type: guide
title: "Postcard Mailing Rates Explained by Size, Class and Volume"
description: "Which postcard sizes keep the low USPS postcard rate, when a card falls to letter or flat pricing, and how bulk mail and EDDM change your cost per piece."
resource: https://www.4over4.com/guide/postcard-mailing-rates-the-complete-guide
tags: ["guide"]
generated:
  by: "process:4over4-mapp-build"
  at: 2026-09-08T01:19:44.025Z
timestamp: 2026-09-08T01:19:44.025Z
sources:
  - resource: https://www.4over4.com/guide/postcard-mailing-rates-the-complete-guide
    title: "Postcard Mailing Rates Explained by Size, Class and Volume"
status: stable
---

# Postcard Mailing Rates Explained by Size, Class and Volume

Which postcard sizes keep the low USPS postcard rate, when a card falls to letter or flat pricing, and how bulk mail and EDDM change your cost per piece.

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

- Page type: guide
- URL: https://www.4over4.com/guide/postcard-mailing-rates-the-complete-guide