Golf club head

A putter-type golf club head comprising:

• a main body including a top portion, a bottom portion opposite the top portion, a striking face, and a rear portion opposite the striking face, the striking face having:
• a striking face plane generally coplanar with the striking face;
• a striking face outer periphery coplanar with the striking face plane;
• a recess extending rearward from the striking face plane, the recess including a recess periphery coplanar with the striking face plane;
• and
• an insert disposed within the recess, the insert including a first portion comprising a first material and a second portion comprising a second material that is different from the first material,
• wherein an imaginary plane is perpendicular to the striking face plane and passes through the recess such that:
• the imaginary plane intersects the striking face outer periphery proximate the bottom portion of the main body at a first imaginary point and intersects the striking face outer periphery distal the bottom portion of the main body at a second imaginary point;
• the imaginary plane intersects the recess periphery at a third imaginary point proximate the bottom portion of the main body and intersects the recess periphery at a fourth imaginary point distal the bottom portion of the main body;
• the first imaginary point is spaced from the second imaginary point by a distance D;
• the third imaginary point is spaced from the first imaginary point by a distance d1 and the fourth imaginary point is spaced from the second imaginary point by a distance d2;
• and
• at least one of a first ratio, d1/D, and a second ratio, d2/D, is no greater than 0.050.

A golf club head comprising:

• a main body including a top portion, a bottom portion opposite the top portion, a striking face, and a rear portion opposite the striking face, the striking face having:
• a striking face plane generally coplanar with the striking face;
• a striking face outer periphery coplanar with the striking face plane;
• a recess extending rearward from the striking face plane, the recess including a recess periphery coplanar with the striking face plane;
• and
• an insert located within the recess, the insert including a first portion comprising a first material and a second portion comprising a second material that is different from the first material, the insert further having a front surface, a rear surface opposite the front surface, an intermediate surface between the front surface and the rear surface, and a maximum length, Lmax, the front surface being coplanar with the striking face plane and having a geometric center,
• wherein a first imaginary plane is perpendicular to the striking face plane and passes through the geometric center such that:
• the first imaginary plane intersects the striking face outer periphery proximate the bottom portion of the main body at a first imaginary point and intersects the striking face outer periphery distal the bottom portion of the main body at a second imaginary point;
• and
• the first imaginary plane intersects the recess periphery at a third imaginary point proximate the bottom portion of the main body and intersects the recess periphery at a fourth imaginary point distal the bottom portion of the main body;
• a second imaginary plane is parallel to the first imaginary plane and spaced from the first imaginary plane by a distance between 0.10*Lmax and 0.40*Lmax such that:
• the second imaginary plane intersects the striking face outer periphery proximate the bottom portion of the main body at a fifth imaginary point and intersects the striking face outer periphery distal the bottom portion of the main body at a sixth imaginary point;
• and
• the second imaginary plane intersects the recess periphery at a seventh imaginary point proximate the bottom portion of the main body and intersects the recess periphery at an eighth imaginary point distal the bottom portion of the main body;
• the first imaginary point and the third imaginary point are spaced by a distance, D1;
• the second imaginary point and the fourth imaginary point are spaced by a distance, D2;
• the fifth imaginary point and the seventh imaginary point are spaced by a distance D3;
• the sixth imaginary point and the eighth imaginary point are spaced by a distance D4;
• at least one of D1, D2, D3, and D4 is less than or equal to 1.5 mm;
• and
• at least one of a first absolute difference between D1 and D3 and a second absolute difference between D2 and D4 is greater than or equal to 2.0 mm.