Starting in 1909 by Sweet Caporal Cigarettes, this series came to be known as Domino Discs due to their back design. Though 129 different players are included, hundreds of different front and back combos account for. Card size: 1-1/8 Diameter. The fronts are player protraits with eaiter a red, blue or green background. Backs have a white donimo printed on the back and are not numbered. The discs are cardboard with a metal rim around the edge.