At least 3 inches high x 6 inches long x 1/4 inch thick.

Minimum box size usps. Usps is most often used for their flat rate shipping services, which benefits businesses that sell. So you have to order a minimum of 2 boxes from ups website. The maximum t3 mailbox size is 13.63” x 7.75” tall on the sides, 12” tall in the center and 16.5” deep.

Packages can be up to 108 inches long. Maximum sizes and weights for usps services domestic services: Your specific shipment may have different package size and weight limits.

The directive set by the. The list below shows the prices and dimensions of all usps flat rate boxes, plus examples of what fits within each box. 12 1⁄4″ x 12 1⁄4″ x 6″.

22″ x 18″ x 15″ for boxes. Packages can be up to 150 lbs. Understanding the specific package sizes and dimensions for usps services will help you make more informed decisions about how to ship your products.

If you’re small items that are heavy, flat rate boxes are going to be your best option. This regulation means that the size. Usps regulations for mail box sizes.

Mailboxes in the us need to meet certain requirements. Size 5 isn’t pictured, but it’s roughly twice as wide as size 4. The chart below shows the usps first class package size restrictions, the usps first class package weight limit, usps package size limits, as well as additional useful maximum.