priority mail international flat rate cost

priority mail international flat rate cost refers to the price for USPS’s international shipping service, which uses flat-rate boxes or envelopes for overseas shipments. The cost for Priority Mail International Flat Rate service depends on the size of the box or envelope used. As of 2025, the cost for a small flat-rate box is approximately $28.50, while the medium flat-rate box costs around $55.00. The large flat-rate box is priced at approximately $75.00. USPS Priority Mail International Flat Rate service is ideal for shipping heavy items internationally, as the price remains the same regardless of the weight of the package, as long as it fits within the specified box or envelope size. This can be a cost-effective option for businesses and individuals looking to send goods to international destinations with reliable tracking and delivery within 6 to 10 business days. It’s important to check the current rates and availability of flat-rate services to ensure accurate pricing.