what is the size of usps medium flat rate box

With a USPS Flat Rate Box or Envelope, you will be able to ship any item of any weight up to 70lbs to any location for the same price assuming it fits properly, without any bulging, within its designated box or envelope. If using non-customized boxes is not a deal breaker for you, USPS Flat Rate Shipping is a great tool to spend less on shipping. This can be a drawback for some because, unless you are a high volume shipper, you cannot get customized boxes with specific branding. In order to have access to the USPS Priority Mail Flat Rate pricing, you must use one of USPS designated Flat Rate Boxes you cannot use just any box of the same dimensions. You can pick them up at any post office or USPS will actually ship the boxes opens in new tab open_in_new to you for free. One of the many benefits of shipping with USPS Flat Rate Boxes is that the boxes themselves are free. There might be a few of these boxes still out there someplace.How You Can Use USPS Flat Rate Boxes and Envelopes to Save on Shipping

The only one that wasn't was the Regional C box, which measured 12 by 12 by 15 inches after the Regional C postage rates were discontinued, the box was available for a few months as a generic non-Regional box. In fact, ALL of the free Priority Mail boxes currently available are below those surcharge thresholds. As long as it doesn't say 'flat rate' or 'Regional' on it, it will ship at the regular Priority Mail rates that are based on weight and distance. The actual thresholds are (1) a length-plus girth over 84 inches (balloon rate) or (2) a volume over 1 cubic foot (dimensional weight).Ī box that's 12.5 x 3.125 x 15.375 has a volume of about 600 cubic inches and a length-plus-girth of 47 inches, both are well under those thresholds.

If all of a box's dimensions are 12 inches or less, then it's mathematically impossible for it to incur a surcharge so they let you skip the step of entering dimensions.

a dimension over 12' doesn't mean it's a 'large package' - it just kicks you to a screen that asks for dimensions.

What is the size of usps medium flat rate box