The height of a tetherball pole is typically 10 feet, according to the Northern Arizona University. The pole can be as short as 7 feet, depending on the height of the players. The rope is long to ensure the ball hangs about 2 feet from the ground.
The tetherball pole is often embedded in the ground or anchored in a concrete-filled tire to ensure it is firmly stationary and stable during the game. The game is played in a circular playing court that is 20 feet in diameter.
Tetherball is a North American, two-player sport in which players try to get the rope wrapped completely around the pole by hitting the ball in a strategic manner and defend against their opponents' attempts to do the same.