
How much is Priority Mail Express flat rate envelope? In general, if a piece is large and relatively light for its size, it is subject to dimensional weight pricing. Priority Mail pieces that exceed one cubic foot, are subject to "dimensional weight pricing". Be no more than 12 inches high x 15 inches long x ¾ inch thick.Sizes for Large Envelopes and Flats.įor Priority Mail, the price is a combination of weight, size, and how far the mailpiece is traveling. Whatever you call them, flats must: Have one dimension that is greater than 6-1/8 inches high OR 11-½ inches long OR ¼ inch thick. Priority Mail Express and Priority Mail envelopes are available at your Post Office or can be ordered online and delivered right to your door by visiting Larger items can be mailed using your own box, a box provided by the USPS, or Readypost® boxes available for purchase in post office lobbies.2 How thick can a priority mail envelope be? The prices are based on the weight of the package, and how far it travels except when Flat Rate packaging is being used. Sending packages via Priority Mail Express you can use Flat Rate Products such as envelopes and boxes or send your items in your own box. And if your package weighs less than 1 lb., use your own envelope and ship via USPS First-Class Package Service.0 Can I use my own envelope for Priority Mail Express?

However, use your own envelope for packages weighing exactly 1 lb.


USPS Flat Rate Envelopes are almost ALWAYS the cheapest option. Postage must be purchased at any Post Office or online at .Ĭan I use my own envelope for USPS Flat Rate envelope? Also, Priority Mail® Flat Rate envelopes - WITHOUT postage affixed - are available free at any Post Office™.
