Number Dominoes ease the playing of all Double 6, 9 and 12 domino games by using large, color-coded, embossed numbers to replace the traditional dots. They are easier to count and tally scores at the end of each round. The large numbers also make for easier identification for those with weaker eyesight. Professional domino size: 1" x 2" x 3/8" thick. Cowhide Leatherette Case with Snap Closure. 91 Dominoes, Centerpiece, 8 Train Markers & Rules to 8 Games, including Chickenfoot^® and Mexican Train^©.