U.S. First Class Stamps vs. InflationOn May 14, 2007, the U.S. Postal Service is increasing the price of a first class stamp to 41 cents (yellow). This graph displays that this increase is roughly tracking inflation (red). 32692110.0Sun, 15 Apr 2007 08:35:45 -0700Wed, 02 May 2007 11:35:43 -0700GrizzoLineGraphthumbnailCPI (1967=100)Cost of U.S. First Class Stamp