This Priority Mail Flat Rate® Envelope envelope features a predetermined flat rate regardless of the weight or destination zone of the package. This product ships in single envelopes (1-5) or in a pack of 10.

Is a Priority Mail mailing envelope Flat Rate?

What is Priority Mail Flat Rate? Priority Mail Flat Rate is a 1 to 3 day shipping service provided by the U.S. Postal Service (USPS) that features one flat rate for delivery of a package or envelope to its destination. The service allows a maximum weight of 70 lbs. or less for each envelope or package.

Is it cheaper to mail Flat Rate or priority?

Priority Mail from USPS is often the cheapest way to get a package to its destination in 1-3 days, tracking included. When your packages are lighter, Priority Mail sometimes even beats Flat Rate on price, particularly on packages that are only a couple pounds and traveling to Zone 4 or closer.