That depends on how much the stamps are worth... and some are no good for postage outside the USA. Check with your local post office, or the Postal Service Web page, for information about foreign postage.
http://www.usps.com/prices/first-class-mail-international-prices.htm is the website you want to use.
However, I found it a bit confusing, so I called the USPS directly. For mail 1 ounce or less, it takes three stamps, at the current prices (August 2010).
if it weighs an ounce or less, three stamps.
The cost is 98 cents to mail an ordinary, up to one-ounce, first-class letter to Euro
How many "Forever stamps is that?
86¢
45 cents
It cost 15 cents to mail a first class mail a letter in 1981. During the 1920s, it only cost 2 cents to mail the same letter.
From WHERE?
How much does it cost to mail a letter to St Croix VI 00820
how much a first letter that weighs 2.1 oz cost to mail
A one ounce letter will cost you $.49 to mail. The fee for mailing a letter just increased in January.
i always wanted to write a letter to my friend. is there a possibility to mail him a letter and how much will it cost.
If you e-mail it, $0.00.
$1.05
.42
$ 0.37
From where?
1.22