This Cylinder Style Shower Door Knob adds a simple elegance to a frameless shower enclosure. The sleek, cylindrical shape is functional without detracting from the beauty of an all glass door.The knob diameter is 3/4 inch (19 millimeter), and it stands 1-1/4 inches (32 millimeters) from the glass surface. The end cap for the single-sided model stands only 5/32 inch (4 millimeter) from the glass surface. This shower door knob is available in a variety of finishes.