The knob measures 3 inches from tip (top-center of glass dome) to toe (bottom of the metal screw). The knob profile extends 1.6 inches from the cabinet or drawer-front (including the metal base). The screw extends 1.4 inches from the bottom of the metal base.
The air bubbles are visible on all sides of the glass knob. The base and screw are nickel/silver in color.