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  1. Priority Mail | USPS

    Priority Mail Flat Rate ® products let you ship packages up to 70 lbs to any state at the same price. Ship from Post Office ™ locations or online from your home or business. Prices start at …

  2. Priority Mail Flat Rate® Medium Box | USPS.com

    The Priority Mail Flat Rate® Top-Loading Medium Box is an easy way to ship featuring predetermined rates regardless of weight (domestically) or destination. This item ships in …

  3. USPS Flat Rate Box Sizes, Prices, and How it Works

    Feb 1, 2021 · USPS Priority Mail Flat Rate boxes are great for e-commerce. We explain USPS Flat Rate box sizes, prices, discounts, and how they works.

  4. Flat-Rate Package Options - About.usps.com

    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. …

  5. How Much Is a Priority Mail Medium Flat Rate Box? Your ...

    Jun 22, 2025 · As of January 2025, the retail price for a Priority Mail Medium Flat Rate Box at a USPS Post Office is $17.65. If you ship online using USPS’s Click-N-Ship or a service like …

  6. USPS Priority Mail Flat Rate®, Flat Rate Boxes - Stamps.com

    Flat rate pricing eliminates the need to weigh packages or calculate shipping fees, as long as the package weighs less than 70 lbs. Each Priority Mail Flat Rate® Box and Envelope features …

  7. New prices – USPS Employee News

    Jan 18, 2023 · Priority Mail service prices will increase approximately 5.5 percent on Jan. 22. Several Postal Service price changes will take effect Jan. 22. Here’s a list of current and new …

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