The cards in this 52-card set measure approximately 2" by 2 5/8". The 1951 Topps Red Back set is identical in style to the Blue Back set of the same year. The cards have rounded corners and were designed to be used as a baseball game. Zernial, number 36, is listed with either the White Sox or Athletics, and Holmes, number 52, with either the Braves or Hartford. The set is denoted on the cards as "Set A" and the Blue Back set is correspondingly Set B. The cards were packaged as two connected cards along with a piece of caramel in a penny pack. There were 120 penny packs in a box. The most notable Rookie Card in the set is Monte Irvin.