A quick, easy, and convenient way for you to ship USPS Priority Mail packages. The Priority Mail Medium Flat Rate Box features predetermined rates regardless of weight (domestically) or destination, similar to the Flat Rate Envelope.
Inside Dimensions: 11" x 8½" x 5½"
Outside Dimensions: 11¼" x 8¾" x 6"
Some key benefits:
* Can be used for Domestic Priority Mail ($12.35) and International Priority Mail ($40.95 to Canada - $59.95 to all other countries, 20 lb weight limit applies)
* Commercial prices are available for postage paid through Click-N-Ship service at usps.com, authorized PC Postage vendors, and other authorized postage payment methods. The Domestic Commercial Base price is $11.30.