how much postage does a forever stamp cover
Also, you may purchase higher denomination postage stamps for heavier postage at the Post Officeâ¢. Avoid placing two Forever Stamps on a mail piece for heavier mail. Additional ounces are much cheaper costing only $0.21 per additional ounce rather than $0.47 for a one ounce letter. If you add two Forever Stamps to a 2 ounce letter, you would be paying for an item that should only cost $0.68.