If you are sending a standard postcard abroad, you will need a First-Class Mail International stamp. 🌐 How to Buy Postcard Stamps Online
Not all mail needs a standard letter stamp! Postcards get a special, lower price tier from the United States Postal Service (USPS) .
To qualify for the $0.61 rate, your card must be a minimum of 3.5" x 5", a maximum of 4.25" x 6", and between 0.007" and 0.016" thick.
The current price for a standard domestic .
Go straight to the source by visiting the USPS Postal Store
If you need to drop your postcards in the mail today, skip the shipping delay and buy them locally. Postcard Stamp Cost 2026: $0.61 Single, $0.247 Bulk