US Flag Sheets (5 x 20), 100 Total USPS Forever Stamps U.S. Flag USPS Forever Stamps - 5 x Book of 20 (100 Total) - 2016 New Release Easy to use Peel-n-Stick! Self Adhesive no Licking! These self-adhesive stamps are being issued in sheets of 20. Issue Date: January 29, 2016 Great stamp to apply on love cards, thank-you notes, invitations, greeting cards Art Director/Designer: Terrence W. McCaffrey, Greg Breeding