Abstract: A marker is disclosed that is adapted to fit onto a hook of a clothes hanger to convey information concerning a garment hung from the clothes hanger. In accordance with an embodiment of the invention, the marker includes an outer wall, a slot opening, a gate barb and a blocking barb. The gate bard and the blocking barb extend generally radially inwardly from the inner peripheral surface of the wall and are positioned on either side of the slot opening within the wall. The gate barb and the blocking barb are non-symmetrical to each other with respect to a plane that extends radially outwardly from the center of the marker through the slot opening and axially along a direction of the hanger hook within the marker. The gate barb flexes more than the blocking barb when the hanger hook is pushed radially inwardly through the slot opening into the marker.