Golf club head with a variable face thickness

A golf club head, comprising:

• a strike face, a crown portion, a sole portion, a rear portion, a toe portion, a heel portion, and a skirt forming a hollow interior cavity,
• wherein the strike face comprises:
• a geometric center,
• a strike face perimeter, an outer periphery, a border perimeter, a thin periphery, an outer transition, an inner transition, a central transition, a hinge located between the central transition and the inner transition, and a central region,
• wherein:
• the central region comprises a central region thickness,
• the hinge comprises a hinge thickness,
• the outer periphery comprises an outer periphery thickness, and
• the thin periphery comprises a thin periphery thickness,
• wherein the central region thickness, the hinge thickness, the outer periphery thickness, and the thin periphery thickness are constant,
• wherein the outer transition comprises an outer transition thickness, the inner transition comprises an inner transition thickness, and the central transition comprises a central transition thickness;
• wherein the outer transition thickness, the inner transition thickness, and the central transition thickness are not constant;
• wherein:
• the central transition comprises a central transition width measured between an outermost margin of the central region to an innermost margin of the central transition, and
• the inner transition comprises an inner transition width measured between an innermost margin of the inner transition to an outermost margin of the inner transition;
• wherein the central transition width is between 0.250 inch and 0.350 inch, and the inner transition width is between 0.150 inch and 0.250 inch.