Golf club head with variable face thickness

A golf club head comprising:

• a body having a crown, a sole, and a hollow interior;
• and
• a face disposed on the body, the face comprising a heel vertical section, a toe vertical section, and a central horizontal section connected to each of the heel vertical section and toe vertical section, the face also comprising an upper central region, a lower central region, a heel region, and a toe region, wherein each of the heel vertical section, the toe vertical section, and the central horizontal section has a first thickness and each of the upper central region, the lower central region, the heel region, and the toe region has a thickness that is less than the first thickness;
• wherein the heel vertical section, the toe vertical section, and the central horizontal section form a substantially X shape;
• wherein the substantially X shape is rotated around a Y axis by at least 10 degrees;
• and
• wherein the face comprises a central elliptical region encircling a portion of the central horizontal section and having a second thickness wherein the first thickness is greater than the second thickness, a first concentric region having a third thickness wherein the second thickness is greater than the third thickness, a second concentric region having a fourth thickness wherein the third thickness is greater than the fourth thickness, and a third concentric region having a fifth thickness wherein the fourth thickness is greater than the fifth thickness.