The last price change was on 6 April 2010. The current 1st class stamp prices are: Standard Letter class 41p. Large Letter class 66p.
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.
.60 cents for a first class stamp. .50 cents for a second class stamp.
In the UK a standard first class Royal Mail stamp in December 2013 is 60p.
A first-class stamp is not the same as a forever stamp. A forever stamp holds the value of a first-class stamp regardless of how often the rate for first-class postage has increased. A first-class stamp only holds its face value.
The cost of a first class stamp in England is 62p.
The price for a US first class stamp is currently 49 cents. The previous rate for a first class stamp was 46 cents.
A second class stamp costs 36p for a letter up to 100grams (as of 30th November 2011)
The price of a 1st class British postage stamp, for domestic use, starts at £0.39 or $0.64 (approx.). You can check out the exact cost on the Royal Mail's website which is linked here.
1st Class Large Letter
Assuming you are talking about a US First Class Stamp: No.
A first class stamp costs 46 cents in the US. Each additional ounce is 20 cents.
A first class stamp covers up to one ounce of postage.