Weight of your mail piece determines the postage required to mail. Take it to your local Post Office and they will quickly answer your question correctly.
44 cents an ounce to mail a first class letter in the USA.
First-Class Mail International Letter $1.05 (as of August 2012, but it increases every year or so).
42 cent for an ordinary first class letter.
Currently, May 2015, in the US one ounce of First Class mail is 49 cents.
How much does it cost to mail a letter to St Croix VI 00820
Just a forever stamp to mail it in the U.S.A
First Class Mail was delivered with three cents in postage.
6 cemts
15 cents
10 days
44 cents to mail it first class
The cost of mailing a letter via first class mail depends on how much the letter weighs, how far you are sending it and if you purchase insurance for the letter. You can calculate online and get a quote from the USPS website.