First-class mail — Letters, postcards or packages up to 13 ounces qualify as first-class mail. Put a postage stamp on a standard letter and you can send it anywhere in the United States for the price of a stamp.

What is USPS first class postage?

First-Class Mail^® service is an affordable and easy way to send envelopes and lightweight packages. First-Class Mail Forever^® stamps cost $0.58 (the current 1 oz price) and will never expire, even if the First-Class^™ postage rate goes up. For packages (up to 13 oz), prices start at $4.30.

What qualifies for first class postage?

First Class Mail is the most common and affordable way to send envelopes and lightweight packages. Anything you send to customers, including bills, invoices, correspondences and merchandise can be sent via First-Class, as long as your letters weigh less than 3.5 ounces. and your parcels weigh less than 13 ounces.