Product Size Product Size Diameter : 0.95" (24 mm) Diameter : 0.98" (25 mm) Diameter : 0.98" (25 mm) Diameter : 1.18" (30 mm) Diameter : 1.46" (37 mm) Diameter : 1" (25 mm) Hole Spacing: Single Knob Regular Knob Small Small Medium Large X-Large 2X-Large 3X-Large 4X-Large Regular Knob Small Knob Total Height : 0.98" (25 mm) Total Height : 0.99" (25.30 mm) Total Height : 1.26" (32 mm) Total Height : 1" (25 mm) Total Length : 1.18" (30 mm)