Aramith 2-1/4" Regulation Size Billiard/Pool Ball: Super Aramith Pro Cup Cue Ball with 6 Red Dots Regulation size training cue ball is crafted from the highest quality phenolic resin which provides exceptional scratch and impact resistance Marked with 6 red dots on the surface of the ball, also known as a measles pattern, allowing you to easily visualize the rotation following your shot Allows you to practice judging the effects of very particular amounts of sidespin, topspin, backspin and other forms of cue ball control Adheres to the most stringent specifications in the industry to ensure each ball has the right density, balance, diameter, roundness, glossiness, hardness and weight Intended to help players of all skill levels improve their game; Measures 2-1/4" in diameter