Use our Priority Mail Flat Rate Envelopes or Boxes that come in standard sizes so you don't have to worry about measuring them. When sealing a Flat Rate Envelope or Box, the container …

Flat Rate Box Sizes and Pricing Ship confidently nationwide with five choices for packaging rates and four delivery speeds.

Nov 17, 2025 · Get the latest USPS Flat Rate sizes, prices, and shipping tips. Learn when Flat Rate saves money and how CFC helps streamline China-to-US fulfillment.

Feb 1, 2021 · In this complete guide, we'll cover everything you need to know about USPS flat rate boxes prices and sizes, Priority Mail shipping options, and when to choose flat rate versus …

Sep 12, 2025 · USPS Flat Rate Boxes provide predictable, zone-independent pricing for packages up to 70 lb. For a large Flat Rate Box, expect to pay $24.75 retail or $19.51 …

Mar 21, 2025 · As a small business or SMB owner handling 100–2,500 orders a month, you might need to quickly identify which USPS Flat Rate Box fits your average items. This reference …

Explore our comprehensive guide to USPS Flat Rate shipping options. Learn about the different box sizes, envelope dimensions, and pricing to determine the best choice for your shipping …

Discover USPS flat-rate box dimensions—small, medium, large, APO/FPO tiers—and when flat-rate boxes offer the best value. Includes dimensions, weight limits, and specialty options.

Nov 25, 2025 · Understanding the size of the box is the first step. You have to make sure your items will actually fit inside before you start packing. The standard large flat rate USPS box …

Priority Mail ® service offers a variety of Flat-Rate Boxes and Envelopes that ship for the same price to any domestic address, regardless of how much they weigh or how far they’re going. …