Dominoes Numbered, Double 12, Professional Mexican Train Set Double 12 dominoes set means 91 dominoes. Provides all the combinations from 0/0 to 12/12 Play Mexican Train or Chicken Foot Dominoes as well as many other dominoe game variations with this set. Numbered Dominoes are easy to read, easy to match, easy to score, easy to count. Solid white, smooth, professional size dominoes measure 2 inches long x 1 inch wide x 3/8 inches thick. Big Bold, recessed, wear-resistant, color-coded, NUMBERED dominoes.