priority mail usps flat rate

priority mail usps flat rate offers a flat rate for shipping packages within the United States, regardless of weight (up to a certain limit) or distance. With USPS Priority Mail Flat Rate, customers can choose from different box sizes, such as the Small, Medium, and Large Flat Rate Boxes. This service is ideal for shipping items quickly and at a predictable cost, with delivery times typically within 1 to 3 business days. Flat Rate Priority Mail includes tracking and up to $50 in insurance for lost or damaged packages.