First-Class Mail International

ALERT: USPS can no longer accept or deliver international mail to several countries due to COVID-19 service impacts. See all countries with temporary service and guaranteed-delivery suspensions. Read 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.