Security Yard Signs are made of a durable 0.055" white polyethylene with white reflective overlaminate. This material resists cracking, peeling and chipping, even in cold weather climates! Signs are designed to be attached to 36" long aluminum stakes (sold separately) with double-sided foam tape. The easy installation requires no screws or tools. If holes are required in the signs, see optional price grid. If drilled stakes are required, call or write for pricing. 9" W x 9" H