Adult tennis racket head size midplus racket head size 645 cm head size inches 100 sq in stringing 14 x 16 level advanced type of racket all round racket balance 360 mm recommended height from 155 cm weight unstrung 255 g grip circumference 109 111 mm racket balance head heavy grip size l3 frame material graphite shape oval frame profile min 24 mm frame max 26 mm length 687 cm length inches 27 season 2014 series prince w