All of our stop signs are made of heavy duty .080 aluminum and meet DOT and MUTCD regulations. Aluminum signs are 30% lighter and have a longer life than steel signs. These stop signs will never rust, even in the harshest conditions. All of these signs come standard with 2 holes for easy mounting on any u-channel sign post. We offer engineer grade reflective and high intensity reflective stop signs. The sizes range from 24 inch all the way up to 36 inch depending on what the job requires.