Please Note: For pack of 10, an order of 1 equals 10 envelopes.
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 flat rate regardless of the weight or destination zone of the package. This envelope is ideal for sending 8 ½ x 11 size documents, including passports and passport documentation.
For more information, please visit the Shipping page