First–Class Mail International

First–Class Mail International service provides a reliable and economical means of sending correspondence (e.g., letters and postcards), documents, and lightweight merchandise weighing up to 4 pounds. Extra services, such as Registered Mail, return receipt, and restricted delivery, may be added on a country–specific basis. See the Individual Country Listings in the IMM.

First–Class Mail International items have the following characteristics:

1. They have different shapes, sizes, and contents.
2. They weigh 4 pounds or less.
3. They are subject to the provisions of the Universal Postal Union (UPU) Convention.

First–Class Mail International items may contain any mailable matter that is not hazardous or prohibited by the destination country, by the U.S. Postal Service, or by law. At the sender’s option, items may be prepared in the form of a “self–mailer” (i.e., without being enclosed in an envelope or wrapper). Such items must have all their open sides secured with tape, tabs, or wafer seals to prevent them from opening during postal handling.

Tables 4a, 4b, and 4c contain the postage prices for First–Class Mail International items. See the “First–Class & M–bag Price Group” column in the Country Listing for the price group that is applicable to each destination country.