This is mainly for junior high school baseball (J.S.B.B), but it's not suitable for official games (the J.S.B.B markings are gone, so there's a good chance it will be rejected during equipment inspection at official tournaments, city/prefecture tournaments, etc.). However, if you only intend to use it for practice swings and batting practice, or for playing with family and friends, please consider purchasing it! The grip is made of soft rubber. Length: Approximately 84cm Diameter: Approximately 6.7cm Weight: Unknown, but it feels light for an adult and possibly a little heavy or light for a junior high school student, depending on the individual.