PARTSMART SMR03550SC Sign, Instant Message; Sidewalk Closed (black on orange) Turn any traffic cone into an instant message device with a custom traffic and pedestrian control cone sign. Message: Sidewalk Closed These durable ABS plastic signs easily attach to all manufacturers' cones and open top delineators. There is a V-shaped notch on base of the sign that prevents tipping. This sign measures: 11" x 13" Black letters on an orange background.