Priority Mail Regular/Medium Flat-Rate Boxes
11-7/8" x 3-3/8" x 13-5/8" (rectangle-shaped)
11" x 8.5" x 5.5" (square-shaped)
Features
Priority Mail service offers two- to three-day service to most domestic destinations. Priority Mail envelopes and boxes are available at many Post Offices and can be ordered online at The Postal Store. You can print Priority Mail labels and postage with Click-N-Ship and receive lower prices.
Prices
Priority Mail Regular/Medium Flat-Rate Boxes are one low price to U.S. destinations, regardless of the actual weigh of the piece.
Discounts available through Click-N-Ship at USPS.com.
When sealing a flat-rate box or flat-rate envelope, the container flaps must be able to close within the normal folds. Tape may be applied to the flaps and seams to reinforce the container; provided the design of the container is not enlarged by opening the sides and the container is not reconstructed in any way.
