The Koda Pure Performance Premium Billiard Ball Set. This ball set features color radiance and true roll tech which enhances ball control, playability, and the life of your cloth. This set was designed to keep its radiant, vibrant color and finish longer than any other set at this price point. With Koda Pure Performance there is no shot you cant make! KBPP billiard balls are regulation 2-1/4″ in diameter.