Head Jannik 21" Junior Tennis Racquet (Ready to Go)This item has already been pre strung from the manufacturer with synthetic string. Weight (unstrung) 180 g 6. 3 oz String Pattern 16 17 Head Size 520 cm 81 in Balance 255 mm 0. 5 in HL Length 535 mm 21 in Beam 20 mm Age 4 6 With its colorful, vibrant design, the JANNIK 21 TENNIS RACQUET is ideal for boys aged 4 to 6 who are just starting their tennis journey. Named after HEAD ambassador Jannik Sinner, this lightweight junior racquet is easy to swing