Select a sign from the drop-down menu when ordering from those shown below.. You can also use your own top and/or bottom words if different from those shown below. The signs shown are small ,12"x12" and large, 12"x18" in size. Our signs are made of 40 mil aluminum, available in either white or caution-yellow colors as shown. Signs are made with weatherproof, non-fading vinyl and should last for years. With diamond-shaped signs as shown only one word is allowed top and bottom.