A hollow body golf club head comprising: a body having a front end; a back end opposite the front end; a crown; a sole opposite the crown, the sole defining a sole surface; wherein a ground plane is tangent to the sole surface when the golf club head is at an address position to strike a golf ball; a heel; a toe opposite the heel, and a hosel structure having a hosel axis extending centrally through a bore in the hosel structure; a strikeface positioned at the front end and defining a geometric center, and a loft plane tangent to the geometric center; wherein the geometric center further defines a coordinate system having the geometric center; the coordinate system comprising an X axis extending through the geometric center between the heel and the toe; a Y axis extending through the geometric center and perpendicular to the X axis, between the crown and the sole; a Z axis extending through the geometric center and perpendicular to the X axis and to the Y axis, between the front end and the back end; the Y axis and the Z axis together define a YZ plane extending between the crown and the sole and between the front end and the back end; an indented region; wherein the indented region is defined where the sole veers inward in a direction toward the internal cavity; a sole transition point defined by an intersection of the sole and the strike face; the indented region comprises a sole curvature profile defined by an intersection of the sole surface and the YZ plane; the sole curvature profile comprises a radius of curvature that varies as the sole curvature profile extends between the front end and the back end; and wherein the radius of curvature is equal to or less than 25.4 cm (10 inches) as the sole curvature profile extends between the front end and the back end; wherein the sole curvature profile comprises a first inflection point and a second inflection point; wherein the sole curvature profile comprises a first concave section extending from the sole transition point to the first inflection point and is concave relative to the XZ plane; a convex section extending from the first inflection point to the second inflection point and is convex relative to the XZ plane; a second concave section extending from the second inflection point to the back end and is concave relative to the XZ plane; wherein the first concave section comprises a radius of curvature; the convex section comprises a radius of curvature; the second concave section comprises a radius of curvature. a body having a front end; a back end opposite the front end; a crown; a sole opposite the crown, the sole defining a sole surface; wherein a ground plane is tangent to the sole surface when the golf club head is at an address position to strike a golf ball; a heel; a toe opposite the heel, and a hosel structure having a hosel axis extending centrally through a bore in the hosel structure; a strikeface positioned at the front end and defining a geometric center, and a loft plane tangent to the geometric center; wherein the geometric center further defines a coordinate system having the geometric center; the coordinate system comprising an X axis extending through the geometric center between the heel and the toe; a Y axis extending through the geometric center and perpendicular to the X axis, between the crown and the sole; a Z axis extending through the geometric center and perpendicular to the X axis and to the Y axis, between the front end and the back end; the Y axis and the Z axis together define a YZ plane extending between the crown and the sole and between the front end and the back end; an indented region; wherein the indented region is defined where the sole veers inward in a direction toward the internal cavity; a sole transition point defined by an intersection of the sole and the strike face; the indented region comprises a sole curvature profile defined by an intersection of the sole surface and the YZ plane; the sole curvature profile comprises a radius of curvature that varies as the sole curvature profile extends between the front end and the back end; and wherein the radius of curvature is equal to or less than 25.4 cm (10 inches) as the sole curvature profile extends between the front end and the back end; wherein the sole curvature profile comprises a first inflection point and a second inflection point; wherein the sole curvature profile comprises a first concave section extending from the sole transition point to the first inflection point and is concave relative to the XZ plane; a convex section extending from the first inflection point to the second inflection point and is convex relative to the XZ plane; a second concave section extending from the second inflection point to the back end and is concave relative to the XZ plane; wherein the first concave section comprises a radius of curvature; the convex section comprises a radius of curvature; the second concave section comprises a radius of curvature.