First class mail stamp cost

The cost of a First Class Mail stamp in the United States varies depending on the weight and size of the mailpiece. As of 2022, the current rates are:

• 1 oz (standard letter): $0.55
• 2 oz: $0.70
• 3 oz: $0.92
• 3.5 oz: $1.05
• 6 oz: $1.15
• 7 oz: $1.20
• 8 oz: $1.25
• 9 oz: $1.30
• 10 oz: $1.35
• 11 oz: $1.40
• 12 oz: $1.45

Note that these rates apply to standard letters, which are defined as rectangular mailpieces with a maximum size of 11.5 inches long, 6.125 inches high, and 0.25 inches thick.

If your mailpiece is larger or heavier than these standards, you may need to use a larger envelope or package, which will require additional postage.

It's also worth noting that the USPS offers a variety of discounts and promotions that can help reduce the cost of mailing. For example, you can get a discount on postage if you use a Forever Stamp, which is a stamp that can be used to mail a 1-ounce letter at the current First Class Mail rate, regardless of future rate increases.