These are the longest-lasting road cones. In fact, this ROAD CONE is made with a super-durable, fluorescent vinyl and a white, high-quality inner liner that assures a brilliant reflection for maximum visibility. This road cone stays put because it’s weighted. They’re easily stackable, weatherproof, really tough and flexible. This road cone is 12 inches ( 30.48 meters ) tall X 9 inches ( 22.86 cm ) wide X 9 inches ( 22.86 cm ) deep. Since these are super-reflective, they’re the best for marking boundaries to help prevent accidents. This road cone is all about safety! Also, this road cone’s round opening on top allows for the placement of signs.