Note: Sizes below indicate the overall artwork height from the top of the Noxious Symbol to the bottomNow you can choose from the following material thicknesses:7.5 mil = 0.0075 inches (0.19 mm)10 mil = 0.010 inches (0.25 mm)14 mil = 0.014 inches (0.36 mm)60 mil = 0.060 inches or (1.54 mm) Click here for more material informationFor outdoor applications and letter/number heights over 10 inches, we suggest using 60 mil material.