I believe this is an old wooden door stop.  It measures about 2 3/8" in D x about 2" across the center.  It has been painted white and does have some chips of paint missing.  On the base there is 1/2 a circle of wood that has chipped away - this spot is about 1/2" across x 3/8" in H.  The measurement does not include a 3/4" screw which comes off of the base.  I would consider this in fair condition.

Wood Door stop vintage