You can use any USPS postage as long as it is at least $0.94. Make sure to write "AIRMAIL" on the letter as well.
As of 2014, it will cost $6.04 cents to mail a letter from the US to South Korea. You will need to use 13 1st class stamps to mail the letter unless you take it to the post office and pay at the window.
Three stamps ($1.26) are needed because it costs between $0.98 and $1.18 to send a letter to Korea from the U.S.
2
One stamp for a letter.
Just one.
South Korea has a literacy rate of roughly 97.9 %, so roughly nineteen out of every twenty South Koreans can read letters.
3
There are 23 players in South Korea
There are 4,000 rivers in South Korea.
It takes three stamps to send a letter to Norway.
There are 25 million women in south korea.
I think there are 28 cities in South Korea .
how many forever stamps = .94