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.

Use our Priority Mail Flat Rate Envelopes or Boxes that come in standard sizes so you don't have to worry about measuring them. When sealing a Flat Rate Envelope or Box, the container flaps must be …

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 …

Welcome to USPS.com. Track packages, pay and print postage with Click-N-Ship, schedule free package pickups, look up ZIP Codes, calculate postage prices, and find everything you need for …

What's the Date you plan to mail the item? What's the Time you plan to mail the item?

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.

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're sending packages or letters, have them properly packaged and addressed before going to the Post Office. Click below for a helpful step-by-step guide.

Learn how to ship a package with USPS, from choosing the right mail service, packing your box, writing the address, calculating postage, and scheduling a pickup.

Informed Delivery is a free service from USPS that shows you preview images of incoming mail, plus status updates about your incoming and outbound packages. Get notifications in a morning Daily …