Aramith 2-1/4" Regulation Size Crown Standard Billiard/Pool Balls, Complete 16 Ball Set Complete set of 16 balls includes 8 solids, 7 stripes and a cue ball; Each ball is regulations size, measuring 2-1/4" in diameter Crafted from the highest quality phenolic resin which provides exceptional scratch and impact resistance Phenolic resin is proven to last up-to 5 times longer than balls made of polymers or polyester Aramith billiard balls adhere to the most stringent specifications in the industry, ensuring superior playability and durability Designed with perfect roundness and balance, uniform weight and hardness, brilliant colors and a friction resistant roll; Ideal for billiard players of all skill levels