The Head Instinct 25 is the perfect first racquet for any youngster today! Pink cosmetic with Maria Sharapova inspired graphics. Ideal junior racquet for children between the ages of 8 & 10. Specifications: For ages 8-10 and 50-55 inches in height. Lightweight with large sweetspot 107 sq. in. 21mm I-Beam. Cross Section Synthetic grip Grip Size: 3 7/8" Pre-Strung by the manufacturer.