Question: how many forever stamps to send a letter to canada 2019?
Answer: The value of contents can not exceed $400.00, and with a max. length 11-1/2", height 6-1/8" or thickness 1/4" Since the current Forever domestic (USA) letter rate stamps are worth 49 cents US each. you would need either 3 of those or 2 of those and the remaining 23 cents in postage.