More dominoes per set allow for more players. Double 15s are used primarily for popular party games for very large groups of players. They have uniform-sized bright color coded pips. Packaged in a heavy-duty, black vinyl, ostrich-grained Leatherette case with a snap lock closure. These Professional size dominoes measure 2 x 1 x 5/16. Rules are included to eight popular, fun games: Moon, 42, 84, Straight Dominoes, Solitaire, Chickenfoot, Mexican Train, and Super Dominoes. A Centerpiece for starting Chickenfoot and Mexican Train is included. For 1-12 players. 136 dominoes per set.