Patent ID: 8353786

Claim:
A golf club head, comprising: a body defining an interior cavity and comprising a sole positioned at a bottom portion of the golf club head, a crown positioned at a top portion, and a skirt positioned around a periphery between the sole and crown, wherein the body has a forward portion and a rearward portion; and a face positioned at the forward portion of the body, the face defining a striking surface having an ideal impact location at a golf club head origin, the head origin including an x-axis tangential to the face and generally parallel to the ground when the head is at an address position, a y-axis perpendicular to the x-axis and generally parallel to the ground when the head is at the address position, and a z-axis perpendicular to both the x-axis and y-axis, the striking surface having a striking surface height between approximately 45 mm and approximately 65 mm, and a striking surface width between approximately 75 mm and approximately 105 mm; wherein the golf club head has a moment of inertia about a golf club head center of gravity z-axis generally parallel to the head origin z-axis greater than approximately 490 kg*mm 2 , wherein the face has a thickness along the head origin x-axis, the thickness increasing in a diverging portion that extends radially outward from the ideal impact location, the thickness being between t min and t max for at least 50% of the x-axis coordinates x within a first range between approximately −10 mm and approximately −50 mm, and a second range between approximately 10 mm and approximately 50 mm, where t min =1.6+0.002378(40 −|x| ) 2 , and (1) t max =2.5+0.002854(40 |x| ) 2 ; and (2) wherein the striking surface has an area between approximately 3,500 mm 2 and approximately 4,500 mm 2 .