Grooves of golf club heads and methods to manufacture grooves of golf club heads

A putter-type golf club head comprising:

• a putter club face defined by a toe end, a heel end, a top rail and a sole;
• a plurality of grooves disposed on the putter club face between the top rail and the sole, each groove of the plurality of grooves extending between the toe end and the heel end and comprising a first horizontal wall and a second horizontal wall;
• wherein the putter club face is generally planar and extends in a generally vertical orientation at an address position;
• wherein each groove of the plurality of grooves is horizontally separated into a toe portion proximal the toe end of the putter club face, a heel portion proximal a heel end of the putter club face, and a center portion between the toe portion and the heel portion;
• wherein a distance between the first horizontal wall and the second horizontal wall of each of the plurality of grooves defines a width;
• wherein the width of each of the plurality of grooves varies in a direction extending between the heel end and the toe end;
• wherein the plurality of grooves are separated by a plurality of land portions;
• wherein a width of the land portions varies in a direction extending between the top rail and the sole, or in a direction extending between the heel end and the toe end;
• wherein the plurality of grooves further comprise a first vertical edge and a second
• vertical edge;
• wherein a distance between the first vertical edge and the second vertical edge defines a length;
• wherein a depth of a portion of the plurality of grooves is about 0.003 inch;
• wherein the putter club face is integral with the putter-type golf club head;
• wherein at a center portion of the width of the plurality of grooves ranges between 0.035 inch to 0.037 inch;
• wherein lengths of the plurality of grooves are equal;
• wherein widths of each of the plurality of land portions increase in a direction from a generally center portion of the putter club face to the toe end;
• and
• wherein widths of each of the plurality of land portions increase in a direction from a generally center portion of the putter club face to the heel end.