Sending a letter to Spain?

Question

I'm from the U.S.

What kind and how many stamps do I need to put on the envelope?

Answer 1

For a letter weighing less than one ounce going First Class, you need 94 cents, any combination of stamps.

For other weights...  http://ircalc.usps.gov/

Select the country, then the class of service, and the weight.

Answer 2

Regular U.S. stamps will do. How many you need depends on the face value of each stamp.

If you want to know how much the total postage will be, just bring the letter to the post office, or go to USPS.com and look up "international postage".