I am selling a 1920s-30s era ceiling light shade.  It  very heavy detailed glass with a frosted center and clear hobnail edging on the top edge and outside edge.  It measures 11" across and 5" deep. This  shade simply slides onto current fixtures rod and then gets capped with a screw on cap. The rod hole is approx 4/8" across. This is a very heavy weight shade so your existing fixture must be attached to a stud in the ceiling. This is a really beautiful shade and is in perfect condition.  Please ask any questions before purchasing.