Adult tennis racket head size oversize racket head size 658 cm head size inches 102 sq in stringing 16 x 19 level advanced type of racket all round racket balance 340 mm recommended height from 155 cm weight unstrung 255 g racket balance even grip size l0 l4 frame material graphite shape oval frame profile min 28 mm frame max 28 mm length 685 cm length inches 27 technology wilson blx season 2015 series wilson blx colou