Billiard ball

Cue balls from (left to right):
  • Russian pyramid and kaisa—68 mm (2+1116 in)
  • Carom—61.5 mm (2+716 in)
  • International pool—57.15 mm (2+14 in)
  • Snooker—52.5 mm (2+116 in)
  • British-style pool—51 mm (2 in)

A billiard ball is a small, hard ball used in cue sports, such as carom billiards, pool, and snooker. The number, type, diameter, color, and pattern of the balls differ depending upon the specific game being played. Various particular ball properties such as hardness, friction coefficient, and resilience are important to accuracy.


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