Crown Sporting Goods Youth Adjustable Height Baseball Batting Tee Made using the highest quality materials Tested for durability Designed to be safe and unique Durable: made of heavy-duty, flexible, all-weather 100% rubber-not plastic Grows w/ players: height ranges from 24" to 38" by simply sliding the tee up or down, and the tee fits most balls, including softballs and baseballs Tip-resistant: flexible and impact-absorbing rubber tee means it's okay to miss the ball Quick, easy set-up 17" x 8.5" x 12", official MLB size