and operates under a universal service obligation (USO), both of which are defined across a broad set of legal mandates, which obligate it to provide uniform price and quality across the entirety of its service area. The USPS has a monopoly on traditional letter delivery within the U.S. The USPS, as of 2021, has 516,636 career employees and 136,531 non-career employees. It is one of the few government agencies explicitly authorized by the Constitution of the United States. Mail, or Postal Service, is an independent agency of the executive branch of the United States federal government responsible for providing postal service in the U.S., including its insular areas and associated states. The United States Postal Service ( USPS), also known as the Post Office, U.S. The full eagle logo, used in various versions from 1970 to 1993

Postal Clause of the United States Constitution.

That is the exact cubic dimension of your package. Multiply the Length, Width, and Height, and then divide that total by 1,728.

For boxes that aren't square, measure the Length, Width, and Height of your box in inches. A 2 cubic foot square box is pretty big and well beyond the size of most packages being shipped. A square package 2 feet by 2 feet is 2 Cubic feet. A square package 1 foot by 1 foot is 1 cubic foot. *Calculating the cubic dimensions of your packages isn't difficult. And when shipping packages, select Large Package. We suggest reviewing your shipping process to ship in the smallest box possible to avoid these surcharges. If the volume of the package is greater than 2 cubic feet, a $15.00 surcharge will be applied*.If the longest side of a package is greater than 30 inches, a $7.00 surcharge will be applied.Packages with missing or incorrect package dimensions that result in any dimensions-based fees, a $1.50 surcharge will be applied.If the volume of the package is greater than 2 cubic feet, a $25.00 surcharge will be applied*.If the longest side of a package is greater than 30 inches, a $15.00 surcharge will be applied.

If the longest side of a package is more than 22 inches but less than 30 inches, a $4.00 surcharge will be applied.USPS Priority Mail and Priority Mail Express

Cost to ship usps medium flat rate box