Head YouTek Graphene PWR Speed Tennis Racquet - 4-3/8 The first oversize Speed model, the PWR offers a generous sweet spot with it's 115 sq. inch head size. This model retains the maneuverability of the tour series thanks to it's even balance. Headsize: 115 square inches / 740 sq. cm Length: 27.3 inches / 69.5 cm Weight (unstrung): 9.0 oz / 255 grams / Weight (strung): 9.5 oz / 270 grams Racquet is unstrung and includesa full cover.