usps flat rate prices priority mail

usps flat rate prices priority mail USPS flat rate prices for Priority Mail offer a convenient and affordable shipping solution for small businesses and individuals. With flat rate boxes and envelopes, customers can ship items of any weight to domestic and international destinations for one fixed price. As of 2025, the cost for a small flat-rate box starts at $10.20, and larger boxes are priced higher. This service is ideal for those shipping heavy or bulky items within the United States or internationally, as it eliminates the need to calculate shipping costs based on weight and distance.