Additional ounce, Priority Mail and Postcard Stamps Available Jan. 24 1/5/2021 WASHINGTON, DC — The U.S. Postal Service will release three new stamps as part of 2021 price change: Barns, a 36-cent postcard stamp; Brush Rabbit, a 20-cent additional ounce stamp; and Castillo de San Marcos, a $7.95 Priority Mail stamp. The stamps will be […]