NFPA Adhesive Label Kit (Placard, Digits & Symbols) By SmartSign | 6" Square Laminated Vinyl NFPA diamond, when measured from the top to bottom of the diamond, is actually 85" high (eg which is the same as the 6" square tilted by 45 degrees) Digits are self-aligning Your NFPA Kit is a snap to assemble Signs conform to round tanks and stick permanently