Double Twelve dominoes is a game played by two or more players. Each half of a domino tile is called an end. An end with no dots is called a blank and a tile with the same number of dots on both ends is called a doublet. The highest ranking tile in Double Twelve domino is the Twelve Doublet or better known as the "Double Twelve". A set of Double Twelve domino consists of 91 tiles or approximately three times as many tiles as a Double Six dominoes. It also includes a center piece, instructions and a tin box to store the dominoes in.