First-Class Mail International
Affordable International Mailing
First-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 $1.65 and never expires, even if the postage price goes up.
- For large envelopes (flats) up to 15.994 oz, postage prices vary based on weight and destination.
ALERT: Effective November 29, 2024, international mail service to Canada is temporarily suspended, due to the strike of the Canadian Union of Postal Workers. Learn more.
Features & Pricing
- Our most affordable international service
- Mail to over 180 countries
- Can be used for postcards, letters up to 3.5 oz, and large envelopes (flats) up to 15.994 oz
- Global Forever stamp available
- Delivery varies by destination
- You can buy Registered Mail® service to most countries
- Prices vary based on weight and destination
Stamp Prices for Letters & Postcards
Stamps for standard-sized letters and standard-sized postcards up to 1 oz start at $1.65 for all countries. However, prices for envelopes heavier than 1 oz, oversized, or unusually shaped is based on the destination country’s price group.
Weight, Size, & Shape Requirements
- Send mailpieces up to 15.994 oz.
- All postcards, letters, and large envelopes (or flats) must be rectangular, otherwise an additional charge may apply. Additional size restrictions apply depending on the type of mailpiece you're sending.
How to Send a Letter or Postcard: International: Get step-by-step instructions on mailing postcards, letters (up to 3.5 oz), and large envelopes (up to 15.994 oz) from the U.S. to other countries.
Additional Charges for Larger Mailpieces & Envelopes
If a mailpiece exceeds the maximum length, height, or thickness of one rate, it will be charged at the next higher rate. Large envelopes that exceed maximum dimensions will be charged package rates: See How to Send a Package: International. Calculate expected shipping costs for international shipments using the International Price Calculator.
Customs Forms
If you just need a customs form, you can use our online tool to fill out the correct form.