Smartsign K-7632-Labrador-Y-AL-12x18"Warning - Yellow Lab Guard Dog" Aluminum Sign, 18" x 12" Heavy-duty, 63 mil thick, rust-proof, recycled aluminum Printed with 3M inks for designed for outdoor traffic or parking signs. Laminate protects against abrasions, chemicals, and UV rays. Laminate is graffiti resistant Rounded corners, for a professional look Won't bend, to outlast the toughest of storms Large, pre-cleared holes for easy mounting. 12"x18" sign has four 3/8" holes, set 1.5" from each corner, with a 1.5" corner radius