The current rate is 44 cents.
20 cents
1 ounce
Postage to Europe from the US is 98 cents for a one-ounce letter.
In 1955, the postage rate for a first-class letter in the United States was 3 cents for the first ounce.
It costs $0.98 to send a postcard or a 1-ounce letter to Aruba. It's $1.76 for a 2-ounce letter and $2.54 for a 3-ounce letter.
65 cents
The postage for a letter sized piece is .90 cents US up to the first ounce.
A standard size, one ounce letter has a 45 cent postage rate.
Postage to Europe from the US is 98 cents for a one-ounce letter.
Domestic postage is $1.39 for an ordinary envelope of uniform thickness.
The first ounce on postage is typically $0.49. Any additional ounce is around $0.21. You are looking at around $0.70 for postage of that letter. Just bring a dollar and you should be fine! If you use a postage meter, there is a 1 cent discount. so the total is $.69.
It is best to take the letter to the Post Office, so the correct postage can be paid.