Dark brown, wooden knob with a convex centre decorated with a 12-petal flower and two rings, the outer one being raised. 1 17/32" diameter and 15/16" high. The grip has two rings and is wider than the top of the knob. The foot has one ring and is wider than the top and grip of the knob. Fits a 1/4" round shaft with a set screw. 3/4" deep.