It only takes a single stamp! But it does have to be the correct denomination. Currently the rate for a four ounce flat in the US is $1.39. (10/2009)
That will depend on the value of the stamps you have. If you have one cent stamps you will need 190 of them. If you have ten cent stamps you only need 19.
it depends on the stamp then you will know how many stamps you will need
3 stamps!
You only need one first class stamp to mail a letter anywhere in the USA.
what stamp amount is needed if the letter is 15 oz.?
what the price to mail letter to
you need ten stamps actually i don't know
4 stamps
One, they print it out at the post office for how much you need (this week).
2
3 stamps.
maybe 2 0r 3 stamps