Head Youtek Extreme Mid Plus Tennis Racquet [Unstrung] This racquet ships pre-strung 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 10.4 oz. unstrung and is Extra Long in length (27 1/4"). The balance of the racquet is 24/26/23mm. The grip size is 4 1/4".