Head Youtek Prestige Mid Plus Tennis Racquet (Unstrung) This racquet ships unstrung This racquet is equiped with YouTek and d30 which combines different technologies to allow the racquet to adapt to every shot you hit. The head size of the racquet is 98 square inches, with a 21mm beam and 18/20 string pattern. The racquet weighs 11.3 oz. unstrung and is standard in length (27"). The balance of the racquet is 1 1/3"HL/310mm. The grip size is 4 5/8".