Baseball Official Size Practice Training Baseballs 12 Ball Pack Blank Baseball Sports Youth/Kids Baseballs for League Play, Pitching, Hitting, Batting, Fielding, Autograph, Gifts Product Features: Official size(9 inch) and weight (5 oz) DURABLE synthetic leather cover for easy grip Competition Level Even Stitch Ulter Durable Completely blank Perfect for private custom with a lot of room for autographs or your logo, creative ideas Have easonable price, Provide the best customer service and with very fast delivery Tips: --Rubber core balls is more softer, less impact which suit for youth, female，beginners. --Cork center balls is much harder and faster, has more impact, suit for elders, professional players.