usps priority mail mailing envelope rate

usps priority mail mailing envelope rate refers to the cost of shipping items using the USPS Priority Mail service, which includes flat-rate envelopes and boxes. Priority Mail envelopes come in various sizes and offer fast, reliable shipping with delivery typically within 1 to 3 business days. Rates depend on the size of the envelope and destination, but USPS Priority Mail flat-rate envelopes offer a fixed price regardless of weight, making them a cost-effective option for heavier items.