ATTRACT ATTENTION Special Buy each sign blank is 24" x18" (18"w x 24"h) COROPLAST CORRUGATED PLASTIC SIGN BLANKS Create your own sign using YELLOW COROPLAST Outdoor durable 4 mil flutes run parallel on the 24" (18" horizontal x 24" vertical , as in PORTRAIT format) Great for indoor/outdoor sign projects. Create your own sign in minutes. Can be use on all Solvent/UV Printing, Screen Printing, Do-It-Yourself with Permanent Markers, etc. FREE SHIPPING via UPS GROUND within lower 48 United States only! For HI, AK, PR and other U.S. territories; shipping cost will be required.