us postal service priority flat rate

us postal service priority flat rate is a shipping option offered by USPS that allows businesses and individuals to ship items at a fixed price, regardless of the weight or destination (within the U.S.). USPS Priority Mail Flat Rate boxes and envelopes come in several sizes, making it easier to predict shipping costs. This service is particularly useful for shipping heavier items without incurring high shipping fees. It’s a popular choice for businesses looking for affordable and reliable shipping options.