---
type: guide
title: "How Mail Out Advertising Works and What It Really Costs"
description: "Mail out advertising explained: saturation mail versus targeted lists, the USPS size limits that set your postage, the formats that work, and what each one costs."
resource: https://www.4over4.com/guide/what-is-mail-out-advertising-a-complete-guide
tags: ["guide"]
generated:
  by: "process:4over4-mapp-build"
  at: 2026-09-16T23:13:27.757Z
timestamp: 2026-09-16T23:13:27.757Z
sources:
  - resource: https://www.4over4.com/guide/what-is-mail-out-advertising-a-complete-guide
    title: "How Mail Out Advertising Works and What It Really Costs"
status: stable
---

# How Mail Out Advertising Works and What It Really Costs

Mail out advertising explained: saturation mail versus targeted lists, the USPS size limits that set your postage, the formats that work, and what each one costs.

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

- Page type: guide
- URL: https://www.4over4.com/guide/what-is-mail-out-advertising-a-complete-guide