Three-Ounce Stamps
Literary Arts: Saul Bellow Stamps
Ursula K. Le Guin Three Ounce
Browse USPS-issued Three-Ounce stamps, also searched for as 3 ounce stamps, for eligible domestic First-Class Mail letters that weigh more than two ounces and no more than three ounces. Each product page states the exact stamp issue, quantity, packaging, and postage type supplied.
Check the Finished Mailpiece
Do not choose postage from weight alone. Shape, dimensions, thickness, rigidity, destination, and nonmachinable characteristics can change the required amount. Weigh and measure the finished envelope after every card, document, or insert has been added.
Combining Postage Values
When combining ordinary Forever stamps or other denominations, calculate the total postage value first. Use the postage decision guide and confirm the final amount for the completed mailpiece before sending a larger batch.
Frequently Asked Questions
Is a 3 ounce stamp enough for every three-ounce envelope?
No. Weight is only one factor; size, shape, rigidity, thickness, and other characteristics can require different postage.
Should I weigh the envelope before adding inserts?
No. Weigh and measure the finished mailpiece with all contents included.
Three-ounce letter example
At rates effective July 12, 2026, a qualifying three-ounce domestic letter costs $1.40: one 82-cent ordinary Forever stamp plus two 29-cent Additional Ounce stamps. A dedicated three-ounce rate stamp can cover its designated rate. This calculation does not apply automatically to flats, rigid pieces, or international mail.
Weigh the completed envelope and review how many Forever stamps you need. Rate checked August 25, 2026.