Golf putter grip

A golf putter grip, comprising:

• a top cap portion, a bottom open end, a main tubular body extended between the top cap portion and the bottom open end, and a hollow lower portion extended from said main tubular body to the bottom open end;
• wherein the top cap portion has a top end and a vent hole;
• wherein said main tubular body has:
• a cavity to receive a golf shaft;
• a non-circular cross-section being symmetrical and remaining similar throughout an axial length of said main tubular body, where said non-circular cross-section has a width dimension defined to be the maximum dimension between the outmost edges of said non-circular cross-section and perpendicularly along the axial length of said main tubular body, and said width dimension is within a range from 44.45 mm to 29.63 mm;
• and
• a first flat front area having a top edge extended to a position within one inch (25.4 mm) from the top end of the top cap portion, a bottom edge located in a range from a position which is within 30% of the overall length of the golf putter grip to a position which is one inch (25.4 mm) from the bottom open end;
• wherein said non-circular cross-section has a depth dimension defined to be the maximum dimension perpendicularly from the first flat front area to a bottom of said non-circular cross-section along the axial length of said main tubular body, and said depth dimension is in a range from 44.45 mm to 23.09 mm;
• wherein said main tubular body is reversely tapered from the top cap portion towards the bottom open end;
• wherein said non-circular cross-section includes a first non-circular cross-section and a second non-circular cross-section;
• the first non-circular cross-section has a depth dimension that is the longest depth dimension in said main tubular body and is located in a range from a position which is within 30% of the overall length of the golf putter grip to a position which is one inch (25.4 mm) from the bottom open end;
• the second non-circular cross-section has a depth dimension that is the shortest depth dimension in said main tubular body and is towards a position within one inch (25.4 mm) from the top end;
• wherein the overall length of the golf putter grip is defined to be the length from the vent hole to the bottom open end;
• wherein the depth dimension of the first non-circular cross-section is longer than the depth dimension of the second non-circular cross-section in a ratio of 1.12:1 to 1.75:1;
• wherein the hollow lower portion has:
• a second flat front area extended from the bottom edge of the first flat front area of said main tubular body towards a position within one inch (25.4 mm) from the bottom open end;
• and
• a non-reversely-tapered body shape extended from said main tubular body to the bottom open end.