The 3HUNDRED Junior range is ideal for advanced junior aged 3 to 12 years old seeking to learn and improve their tennis. Length 25 4'6 5' tall137 152cm, 9 12 years Headsize 100 sq inch Strung weight 8.46 oz String pattern 16x17 Length 23 4' 4'6 tall122 137cm, 6 9 years Headsize 95 sq inch Strung weight 7.40 oz String pattern 16x17 Length 21 3'6 4' tall110 122 cm, 4 6 years Headsize 95 sq inch Strung weight 6.87 oz String pattern 16x17 Length 19 Up to 3'6 tallup to 110 cm, up to4 years Headsize 87 sq inch Strung weight 6.70 oz String pattern 16x16