Cabinet Knob

FIG. 1 is a front perspective view of a cabinet knob showing my ornamental design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left view thereof;

FIG. 6 is a right view of thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines shown represent portions of the cabinet knob that form no part of the claimed design.