First-Class Mail International
Affordable International Service
First-Class Mail International is the most affordable postage for sending international postcards, letters, and flats to more than 180 countries in addition to Canada.
Global Forever® Stamps
Mail postcards and letters up to 1 oz anywhere in the world. Prices begin at $1.15. Available at Post Office™ locations.Buy Stamps
- Our most affordable international service
- Can be used for postcards, letters, and large envelopes
- Eligible for flats up to 4 lbs
- Global Forever stamp available
- Delivery varies by destination
The price for First-Class Mail International® varies based on weight and destination. 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. Calculate expected shipping costs for international shipments using the International Price Calculator.Calculate a Price
Additional Pricing InformationSee Pricing Files
Price List (Retail)
Price List (Online/Commercial Base)
All postcards, envelopes, and flats must be rectangular. Letters and flats may contain only documents, no goods. Additional size restrictions apply depending on the type of mailpiece you’re sending.
Weight and Size Restrictions
Can send mailpieces up to 4 lbs. Restrictions may apply.
There are restrictions for mailing restricted, prohibited, and hazardous materials, including cigarettes and smokeless tobacco.
See All Restrictions
If you just need a customs form, use our online tool to fill out the correct form.