Each team plays with ten field players and a goalkeeper. Players use sticks made of wood, carbon fibre, fibre glass, or a combination of carbon fibre and fibre glass in different quantities, to hit a round, hard, plastic hockey ball. The length of the hockey stick is based on the player's individual height: the top of the stick usually comes to the players hip, and taller players typically have longer sticks.[1] The sticks have a round side and a flat side, and only the flat face of the stick is allowed to be used.