SmartSign Adhesive NFPA Sign Kit with Symbols & Letters, Legend "Laminated Vinyl Adhesive NFPA Placard Kit", 34" tall diamond (point to point), Black/Blue/Red/Yellow on White NFPA diamond, when measured from the top to bottom of the diamond, is actually 339" high (eg which is the same as the 24" square tilted by 45 degrees) Digits and symbols are included and are easy to attach to the NFPA sign blank Digits are self-aligning Signs conform to round tanks and stick permanently