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
How much is the postage for a 5 x 7 postcard
98 cents
Here is a site that has the information you are looking for http://www.prometric.com/NR/rdonlyres/ebi7ryy5oknk74imu7ruk4wofnfjen674endyxp554t446wg64ryi4poz4353lkseom4jikujqlr2zdg4xrrksinzjc/ARCNABulletin20060208.pdf
The USPS has had a 32 cent postage rate on what was once called the penny postcard since 22 January 2012.
It cost 98 cents today - July 27, 2010
The postage for a postcard is valued at $0.33 as of 2014. This can vary depending on the size of the postcard and may change as the Postal Service changes its rates.
27
A regular envelope cost $1.89 to send to Mexico.
As of right now (August 2008), postage for a postcard from Quito, Ecuador to the US is $1.56
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.
Currently, 34 cents.
August 2010 prices. Small Letters and postcards. First class .......- £0.41p - Royal Mail aims to deliver by the next day. Second class.. - £0.32p - Royal Mail aims to deliver within three days.
Postage in 1960 was was 4 cents for a First Class letter in the US. It went up to 5 cents in 1963. A postcard could be mailed for 3 cents.