Size: ø 57.2 mm Sportime Pool Balls: For your pool table - The Sportime Pool Sport billiard balls are made of durable plastic. The black numbers are engraved, ensuring they do not wear off even after years of intensive use. The pool balls, precisely ground to 1/10 mm, impress with their excellent and accurate rolling properties. 16 billiard balls in a box. - Available in 2 sizes - The billiard balls are available in 2 sizes: The ø 38 mm balls are suitable for tabletop games, while ø 57.2 mm is the standard tournament size for pool billiard balls. - Product details: - Material: Plastic - Depending on the version: ø 38 mm or ø 57.2 mm - Ground to an accuracy of 1/10 mm.