It's all about weight and delivery times.
Find out here: http://www.usps.com
There are many countries in Europe and there are many prices of stamps. If you are talking about the cost of sending something to Europe, that will depend on where you are, what you are sending and where in Europe you are sending it to. You would need to go to your local post office to find out what it would cost.
44 cents
probably around 20
Depends on where you are sending it from!It costs 98 cents from the US in the year 2010.
Postage to Europe from the US is 98 cents for a one-ounce letter.
96 cents
75 cents is the cost of sending an ordinary letter to Canada from the US.
Currently an international first class letter of one ounce is 98 cents.
A regular letter gets one first class stamp- 46 cents.
If you were going to mail a letter, you needed a stamp. Sending one without it would result in postage due being affixed, and the receiver would have to pay for it. The cost of a stamp was 3 cents.
This depends only on the weight of the letter. If it is under 13oz you can send it anywhere in the country with 1 first class stamp.
about $1.56 for 5onces. go here to see all the options http://postcalc.usps.gov/