usps priority mail flat rate large box cost

Maximum combined length and girth (girth is the distance around the thickest part) is 108 inches.

You’ll need to measure your package to make sure it meets the size standards.

Pay for your package based on how much it weighs and how far it’s going (the zone).

Use your own box and pay by weight and zone (distance): When sealing a Flat Rate Envelope or Box, the container flaps must be able to close within the normal folds.Use our Priority Mail Flat Rate Envelopes or Boxes that come in standard sizes so you don't have to worry about measuring them.Pay the same price for mailpieces weighing up to 70 lbs going anywhere in the U.S.That is the exact cubic dimension of your package.Weight, Size, & Shape Requirements Use USPS Priority Mail Flat Rate packaging and pay one price: 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

Usps priority mail flat rate large box cost