First-Class Mail International cards, letters, large envelopes (flats), and packages (small packets) are charged postage for each addressed piece according to its weight and zone. For prices, see the Individual Country Listings.
Other than postcards, First-Class Mail International prices are charged per ounce or fraction thereof; any fraction of an ounce is rounded up to the next whole ounce. For example, if a piece weighs 1.2 ounces, the weight (postage) increment is 2 ounces. The minimum postage per addressed piece, except for postcards, is that for a piece weighing 1 ounce.
See the Individual Country Listings for First-Class Mail International postage prices that are applicable to specific destination countries. Exhibit 243.13 shows the country-specific price group designations that apply to First-Class Mail International service.
First-Class Mail International Price Groups
First-Class Mail International items may be paid with postage stamps, postage validation imprinter (PVI) labels, postage meter stamps, information-based indicia (IBI), PC Postage service, or permit imprint.
Mailers may use a permit imprint for mailings that contain identical weight pieces. Any of the First-Class Mail International permit imprint formats shown in Exhibit 152.44 is acceptable. Postage is calculated as described in 243.12 and is deducted from the mailer’s advance deposit account. Permit imprints must not denote bulk mail, nonprofit, or other domestic or special mail markings. Mailers may use permit imprint with nonidentical weight pieces only if authorized to use postage mailing systems under DMM 705.
First-Class International shipments that are entered by federal agencies and departments are subject to the same standards under 240 as First-Class Mail International shipments that are entered by nongovernmental entities.
First-Class Mail International shipments that are entered by U.S. Postal Service entities are subject to the same standards under 240 as First-Class Mail International shipments that are entered by nongovernmental entities, except that U.S. Postal Service mailings must bear the G-10 permit indicia that are prescribed for all Postal Service official mail. See 142.2.