This Game is played with 51 wooden blocks. Each block is three times as long as it is wide, and one fifth as thick as its length 1.5 cm × 2.5 cm × 7.5 cm (0.59 in × 0.98 in × 2.95 in). Blocks have small, random variations from these dimensions so as to create imperfections in the stacking process and provide additional challenge to the game.