Note that the above name, “Uncle Sam’s Hat,” is the official USPS name for this issue. On February 18, 2017, in Mesa, AZ, the U.S. Postal Service will issue the Uncle Sam’s Hat additional ounce rate stamp (Nondenominated priced at 21 cents), in one design, in a pressure-sensitive adhesive (PSA) pane of 20 stamps (Item 119700).