That depends on where you are .
What is the cost of a letter to be mailed from US to Canada
The cost of a Royal Mail first class stamp is 60p. The price of a Royal Mail second class stamp is 50p. A first class large letter stamp is priced at 90p. A second class large letter stamp is priced at 69p.
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In 1900 the price of a stamp to mail a letter was 2 cents. In 2008 a first class postage stamp cost 42 cents.
The cost of a Forever Stamp in the US is whatever the current cost is for sending a 1 ounce letter by First Class Mail. As of June 2009, that is $0.44.
Two cents for ordinary letter stamp.
In the UK, 1st Class stamp for a standard letter is currently 41p or 61p for a standard large letter (Jan 2011)
Monaco. Monaco.
The current cost of a first class mail stamp is 49 cents.
The normal cost of a postage stamp(44 cents in the USA)
The cost is 98 cents to send an ordinary letter to Europe from the US.
In the US a first class stamp cost 5 cents in the US. A postcard cost 4 cents. It went to 6 cents in January of 1968.