Dominoes Mexican Train, Double 12 Set, with Color-Coded NUMBERED Dominoes Professional Mexican Train, Double 12, Dominoe Set in attractive train shaped storage tin. Solid white, super-smooth, professional size dominoes with color-coded NUMBERS. Recessed (embossed) long-lasting multi-color, NUMBERED dominoes. Each Number represented by a different color.. Professional sise dominoes measure 2 inches long by 1 inch wide, by 5/16 inches thick. Includes total of 19 colorful plastic train markers. An additional ten train markers have been added to the 9 supplied by the manufacturer.