This bowling ball ships PRE-DRILLED. There are 5 sizes and the sizes that we drill are based on the weight of the ball. X-Small: 6lbs- Ages 8 and under, Small: 8lbs and 9lbs- Ages 8-11 and womens ring size from 8-11, Medium: 10lbs, 11lbs, and 12lbs, Ages 11-15 and Adult Ring size 10 or lower, Large: 13lbs and 14lbs, Mens ring size 10-12 or people with larger hands, X-Large: 15lbs and 16lbs, Mens ring size over 13 or people with extremely large hands. If you would like a different size drilled for the weight you selected, you must contact us via email as soon as your order is placed with your order number. Pre-Drilled bowling balls cannot be returned or exchanged. The White Dot is the most popular polyester ball in history because of its consistent durability and color. Whether you're a youth bowler or a beginner, or an experienced bowler who needs to pick up some spares, Columbia 300 has a White Dot that will fit your personality and improve your game. Series: White Dot Color: Scarlet / Gold / Black Core: Bullet Coverstock: Polyester Finish: Crown Factory Polish Weights: 15-8, 6 Pounds Lane Condition: Any Reaction: Straight Warranty: One year from purchase date