HEAD Graphene Radical MP Tennis Racquet Heads Graphene Radical MP offers maneuverability in an updated 16 x 19 open string pattern. Headsize: 98 square inches / 630 sq. cm Length: 27 inches / 68.5 cm Weight (unstrung): 10.4 oz / 295 grams Balance (strung): 4 points head light / 33 cm