Know Before You Mail

All pieces that are 1/4" thick or less are nonmailable unless they are rectangular, at least 3-1/2" high, 5" long (domestic mail) or 5-1/2" long (international mail), and .007" thick.

Note: To determine nonstandard or nonmailable items, the length is the dimension that is parallel to the address when read; the height is perpendicular to the length.