44 cents
The cost for first class postage in 1944 was 3 cents. You could send a postcard for 1 cent.
To mail a first class international postcard to Canada, you will need to attach $1.10 in postage. The maximum size for a postcard is 6" in length x 4.25" in height.
First class postage rate was 29 cents for the first ounce. Second ounce was 23 cents. A postcard cost 19 cents.
For a postcard that is 6 inches long by 4 and 1/4 inches high, first class postage in the US is 27 cents as of June 2008.
First class postage was 5 cents for the first ounce. A postcard was 4 cents.
In 1996 the first class rate was 32 cents. A postcard was 20 cents.
In 1990 the first class stamp was 25 cents. For a postcard it was 15 cents.
No, it is not. The current rate for a postcard from US to Canada is 85 cents (as of March 2012).
As of May 2011 any postcard over 4.25"x6" and less than 6.13 x 11.5" is considered regular First Class and is $0.44
In the US, 12 cents was never a first class rate. It was valid for a postcard during part of 1981.
Same as a first class letter since it's larger than a standard postcard. So the postage will be 45 cents domestically, 85 cents to Canada and Mexico, and 1.05 dollars to the rest of world as of 2012.
A first class stamp in 2008 started at 41 cents and went to 42 in May. A postcard was 26 and then 27 cents.