First-Class Mail & Postage | USPS
qusps.usps.com › ship › first-class-mailLarge envelopes (flats) start at $1.20. Small packages start at $4.50. Weight, Size, & Shape Requirements Maximum weight for First-Class Mail letters is 3.5 oz; for large First-Class Mail envelopes and parcels, the maximum weight is 13 oz. All postcards and envelopes (or flats) must be rectangular, otherwise an additional charge may apply.
First-Class Mail & Postage | USPS
www.usps.com › ship › first-class-mailLarge envelopes (flats) start at $1.16. Small packages start at $4.50. Weight & Shape Requirements Maximum weight for First-Class Mail letters is 3.5 oz; for large First-Class Mail envelopes and parcels, the maximum weight is 13 oz. All postcards and envelopes (or flats) must be rectangular, otherwise an additional charge may apply.
First-Class Mail International | USPS
www.usps.com › international › first-class-mailFirst-Class Mail International ® (FCMI) service is the most affordable way to send letters and large envelopes to more than 180 countries, including Canada, Great Britain, and Australia. Send 1 oz letters or postcards around the world with one Global Forever ® stamp, which currently costs $1.40 and never expires, even if the postage price goes up.
First-Class Mail & Postage | USPS
www.usps.com › ship › first-class-mailFirst-Class Mail Forever ® stamps cost $0.60 (the current 1 oz price) and will never expire, even if the First-Class ™ postage rate goes up. For packages (up to 13 oz), prices start at $4.50. Buy Stamps First-Class Mail Prices. ALERT: As a result of the ongoing COVID-19 emergency, certain packages may take longer than usual to arrive.