Junior tennis racket head size midplus racket head size 645 cm head size inches 100 sq in stringing 16 x 19 balance 325 mm recommended height 140 155 cm weight unstrung 240 g racket balance head light grip size l0 l1 shape oval frame profile min 24 mm frame max 24 mm length 66 cm length inches 26 technology head graphene players maria sharapova tom berdych additional information the offers may vary in grip sizes