One as long as the letter is a few pages and fits in a normal sized (about 9x4) envelope.
If you try to stuff a marble in the same envelope, or cram a booklet in there, it will cost you more.
Previous answer (posted in the thirty seconds it took me to write mine):
Just one.
One
It typically costs one Forever stamp to mail a standard letter from Georgia to Illinois. However, the exact number of stamps needed may vary depending on the weight and size of the letter. It's always best to check with the postal service for current rates.
1 stamp! unless its a big letter
Tu es 99 euros
Enough to add up to the cost of postage. Currently a first class letter of one ounce is 44 cents.
what the price to mail letter to
how many forever stamps = .94
5
First class mail is delivered in 3 to 5 days
No, the postman will ignore it. Go get stamps.
typicaly 2 stamps
maybe 2 0r 3 stamps