


Pay for your package based on how much it weighs and how far it’s going (the zone).Use USPS Priority Mail Express Mailing Boxes and pay by weight and zone (distance): When sealing a Priority Mail Express Flat Rate Envelope, the container flaps must be able to close within the normal folds.Pay the same price for mailpieces weighing up to 70 lbs going anywhere in the U.S.Weight, Size, & Shape Requirements Use USPS Priority Mail Express Flat Rate Envelopes and pay one price:
