The cards in this 576-card set measure 2 1/2" by 3 1/2". The sharp color photographs of the 1963 set are a vivid contrast to the drab pictures of 1962. In addition to the "League Leaders" series (1-10) and World Series cards (142-148), the seventh and last series of cards (523-576) contains seven rookie cards (each depicting four players). Cards were issued, among other ways, in one-card penny packs and five-card nickel packs. There were some three-card advertising panels produced by Topps; the players included are from the first series; one panel shows Hoyt Wilhelm, Don Lock, and Bob Duliba on the front with a Stan Musial ad/endorsement on one of the backs. Key Rookie Cards in this set are Bill Freehan, Tony Oliva, Pete Rose, Willie Stargell and Rusty Staub.