Garden chess set big The sise of the pieces are 25.5 inch. 64 cm. kingshight The base size of the chesspieces is 9 inch. 22 cm in diameter. We advice concrete pavement stones from 40 x 40 cm. 16 x 16 inch. The 32 pieces are made of white and black plastic. Tip; because the chesspieces are made of two parts, you can increase the weight of the feet by filling it with some sand.