Years ago, shortly after the Flat Rate Boxes were introduced, I overheard a conversation at the post office in which the clerk must have spent five minutes trying to get some guy to understand that a Flat Rate Box was going to cost him more than the normal rate structure.

If it's a light item that is not traveling far - within New York state, for instance - then USPS' normal weight-based rates are probably cheaper. USPS advertises the Flat Rate Boxes based on convenience - 'If it fits, it ships for one low price!' is the slogan - but this has gulled a lot of people into thinking that it's always a bargain. The one thing that I would emphasize is that it really depends on the weight and destination whether Flat Rate Boxes make sense for you.

N Get the packaging, labels, and forms you need for a well-stocked mailroom free of charge at ®.Others have already given you a good explanation of Priority Mail Flat Rate Boxes and how they work, but I just want to make sure I understand your situation: You live in Canada but you do your shipping by USPS out of the Niagara Falls post office? I know that many Canadians who live near the border do this because it's cheaper just want to make sure I understand. N One price regardless of weight or distance, up to 70 pounds. N Available 365 days a year to most locations, including Sundays and holidays for an additional fee. 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.

Usps medium flat rate box size