Usps flat rate boxes are boxes with flat rates, no matter what the weight of the package is.

Smallest box usps will ship. At least 3 inches high x 6 inches long x 1/4 inch thick. Priority mail flat rate® small box. Plus, you can schedule a usps ® pickup from your home or office.

Except for usps retail ground and parcel select, no mailpiece may measure more than. I have a box (4 x 4x 4) that i want to ship usps first class to the east coast from los angeles, california. The smallest size allowed is 6″ x 3″ x.25″.

If you’re small items that are heavy, flat rate boxes. If the piece is larger than that or is not rectangular, then it would need to ship as a package and. Except for usps retail ground and parcel select, no mailpiece may measure more than 108 inches in length and girth combined.

Lettersize pieces have a maximum size of 11.5″x6.125″ and cannot be more than 0.007″ thick. 8 5/8″ x 5 3/8″ x 1 5/8″ brochures. This rule applies for any usps mail class you decide to ship in.

Usps small flat rate box dimensions: 108” combined length + girth maximum. Enter the smallest measurements, print this out, and adhere it.

11 1⁄4 x 8 3⁄4 x 6″. 8 ⅝ x 5 ⅜ x 1 ⅝ sized for: These boxes are ideal for packing things like books, cds and dvds, and small appliances.