The ‘Reserved For Visitors’ Cone Sleeve can be used with 36” high cones but it may fit a little loosely as some 36” cones tend to be slimmer towards the top.  Our Cone collar sign measures 10.25" x 9.5" and fits perfectly over standard 18" and 28" high cones, the most common sizes of traffic cones. Reflective sleeve is made of durable polyester and the message is printed 3 times on the sleeve for 360° degree viewing.