The Head Instinct 21 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 4 & 6. Specifications: For ages 4-6 and 40-44 inches in height. Lightweight with large sweetspot 107 sq. in. 19mm I-Beam. Cross Section Synthetic grip Grip Size: 3 3/4" Pre-Strung by the manufacturer.