Question: are there different size pool balls?
Answer: Billiard balls come in different sizes and designs that vary by game type. ... Other variations of billiard ball sizes are Carom at 2 7/16” | 61.5 mm, American-style at 2 1/4” | 57 mm, and British-style at 2 3/16” | 56 mm. Billiard balls come in different sizes and designs that vary by game type.