Cue sports playing nine-ball. Snooker balls are smaller than American-style pool balls with a diameter of 52.5 mm ( in), and come in sets of 22 (15 reds, 6 "", and a cue ball). English billiard balls are the same size as snooker balls and come in sets of three balls (two cue balls and a red, an object ball). Other games, such as bumper pool, have custom ball sets. Billiard balls have been made from many different materials since the start of the game, including clay, bakelite, celluloid, crystallite, ivory, plastic, steel and wood. The dominant material from 1627 until the
Rules of snooker the cue ball anywhere inside the D and attempting to hit and/or pot one or more of the red balls. It is common for players to start by placing the ball on the line, between the brown ball and either the green or yellow ball. The break-off alternates between players on successive frames. Only one player may visit the table at a time. A "break" is the number of points scored by a player in one single visit to the table. A player's turn and break end when he fails to pot a ball, when he does something against the