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.

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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 …

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

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.

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.

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.

You can only send certain types of media: If you try to include anything that's not allowed, you (or your recipient) will have to pay higher postage rates. All Media Mail packages are subject to opening and …

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.