The cost of first-class mail increases today to 63¢ (up from 60¢). The price for 1-ounce metered mail increases to 60¢, and the price to send a domestic postcard is 48¢. A 1-ounce letter mailed to another country is $1.45. There is no change to the single-piece letter and flat additional-ounce price; it stays at 24¢. #IdeaoftheDay