us postal international flat rate box

us postal international flat rate box is a shipping option provided by USPS that allows customers to ship packages internationally at a fixed cost, regardless of the weight (up to a certain limit) or destination country. USPS offers several types of international flat rate boxes, including small, medium, and large, making it an affordable option for sending items abroad. The service includes tracking and delivery confirmation, and customers can estimate the cost using the USPS price calculator.