N Our fastest service for time-sensitive letters and documents. Domestic Express Mail Flat-Rate Packaging Information N Delivery to Alaska, Hawaii, Puerto Rico, Guam, or the U.S. Priority Mail Large Flat-Rate Box (APO/FPO/DPO) Priority Mail Medium Flat-Rate Box (FRB2) Priority Mail Medium Flat-Rate Box (FRB1) Domestic Priority Mail Flat-Rate Packaging Information With flat-rate shipping, there’s no need to weigh anything that can fit (up to 70 pounds) if it is shipped domestically.Īll USPS ® Priority Mail and Express Mail packaging material is available free of charge at Post Offices™ or may be ordered online at no additional cost and shipped to any home or business.

Our Express Mail ® Flat-Rate Envelope eliminates the need to weigh contents and calculate postage for anything that can fit into the Flat-Rate Envelope.

Prices vary by product, as shown in the table below. 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.

Priority mailÂ® small flat rate box