Priority Mail Flat Rate Envelope 12-1/2" x 9-1/2"
The Priority Mail® Flat Rate Envelope is quick, easy, and convenient — simplifying your Priority Mail shipping process for documents. Just like the Flat Rate Boxes, this paperboard envelope features a predetermined rate of $5.60 regardless of the weight or destination zone of the package.
* Can be used for Domestic Priority Mail ($5.60) and International Priority Mail ($19.95 to Canada, $23.95 to all other countries, 4 lb weight limit applies)
Priority Mail Express Flat Rate Envelope 12-1/2" x 9-1/2"
The Priority Mail Express™ Flat Rate Envelope offers our fastest service for time-sensitive letters, documents or merchandise. Guaranteed next-day and second-day delivery nationwide or your money back.
Some key benefits:
- Can be used for Domestic Priority Mail Express ($19.95)