The billiard pool table balls set is cased in a box that includes 7 striped balls, 8 dark marble style colored balls and 1 white cue ball, and each ball measures (2-1/4"") 57 mm in diameter, and (5.9 oz) 168 grams in weight. The balls are made from polyester resin which provides exceptional scratch and impact resistance, produced to the most exacting tolerances, meeting all professional quality benchmarks for size, roundness, density, balance, weight, color, and hardness, ensuring superior playability and durability. The set is great for game rooms, bars.