How many first-class forever stamps do I need to send mail from the U.S. to South Korea?


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First Class Stamp So I am assuming you are going to use a letter size parcel, weighing 10 oz. That is $8.86, and a forever stamp is worth .44, so 21 stamps will be needed. Please keep in mind that it depends on where you send it from in the US, and where to in SK.

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