The cards in this 324-card set measure approximately 2 1/16" by 3 1/8". Many of the obverses of the cards appearing in the 1951 Bowman set are enlargements of those appearing in the previous year. The high number series (253-324) is highly valued and contains the true Rookie Cards of Mickey Mantle and Willie Mays. Card number 195 depicts Paul Richards in caricature. George Kell's card (number 46) incorrectly lists him as being in the "1941" Bowman series. Cards were issued either in one card penny packs which came 120 to a box or in six-card nickel packs which came 24 to a box. Player names are found printed in a panel on the front of the card. These cards were supposedly also sold in sheets in variety stores in the Philadelphia area.