The US Postal Service’s Priority Mail is a quick yet economical way to mail packages under 70 pounds within the United States. Using Priority Mail Flat Rate packages designed by USPS or your own boxes, you can ship items across the country and have them arrive in one to three days to most locations.
Also question is, how much is priority mail?
Priority Mail Flat Rate ProductsFree Supplies8Shipping PriceGreat forSmall Flat Rate Box$7.05 commercial base $7.20 at Post Office (retail & online)Brochures Small ElectronicsMedium Flat Rate Box – 1 (top-loading)$12.85 commercial base $13.65 at Post Office (retail & online)Office Supplies Shoes