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First-Class Mail International

Image of an Air Mail envelope with a First-Class Global Forever® stamp.

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

Features

  • 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
Insurance and Extra Services Details

Pricing

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 Information

See Pricing Files
Price List (Retail)
Price List (Online/Commercial Base)

Restrictions

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.


View Country-Specific Restrictions

There are restrictions for mailing restricted, prohibited, and hazardous materials, including cigarettes and smokeless tobacco.

See All Restrictions

Customs Forms

If you just need a customs form, use our online tool to fill out the correct form.

Create a Customs Form