If you blinked, you did not notice that the price of stamps went up Sunday. The price of a Forever Stamp went up two cents from 47 to 49 cents on Sunday. This is the first time since 2015 that the U.S. Postal Service has raised the price of stamps. However, stamps only cost 47-cents for less than a year after the Postal Regulatory Commission forced a price drop in April 2016. Despite the change in price for forever stamps, the price of postcards, international letters and additional weight will all remain the same in 2017. A postcard costs 34-cents. An international letter cost $1.15 and additional weight cost 21-cents per ounce. USPS cites several reasons behind the price increase, including adjustments for gas in mail trucks, wages, maintenance costs for its buildings and other factors. Forever stamps were first introduced in April 2007, and within four years, all first-class one-ounce stamps became Forever stamps according to the USPS website. The Forever Stamps were developed “for consumers ease of use” during price changes.