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USPS shows you how to send a letter or postcard in the U.S., from choosing an envelope, writing the address, buying and applying stamps, and finding a drop-off location.

Send mail and packages with USPS online shipping options. Choose your mail service by delivery speed, cost, and additional services like tracking and insurance.

If you send mail on a Saturday or the day before a holiday, the Sunday or holiday is not included in the expected delivery time. If you send mail with a 3-day service standard on Friday, the expected …

Cost of First-Class™ Stamps Letter Stamps Standard-sized, rectangular envelopes From $0.78 Square, Oversized, or Unusual Envelopes From $1.27 Postcard Stamps Standard-sized, rectangular …

First-Class Mail is a fast, low-cost way to send envelopes and postcards. See First-Class Mail and Forever stamp prices for a letter and postcard.

You can use Priority Mail Express Return as a fast, convenient option for customers who need to send items back. Both outbound and returns include $100 insurance.

Learn how to use USPS to send letters from the U.S. to other countries: What you can send, how to write addresses, ways to buy postage, and more.

Get Started! Enter the 3- or 5-digit ZIP Code ™ you're shipping from. Drag and zoom the map to see the area you're mailing to, as well as Alaska Hawaii, and U.S. territories that receive Priority Mail service.

Send 1 oz. letters or postcards around the world with one Global Forever ® stamp, which currently costs $1.70 and never expires, even if the postage price goes up.