Security Sign - Private Property - No Trespassing - #416 We manufacture and sell ONLY the Highest Quality Signs that are made This is a 100% Weatherproof UV Protected sign that will not Rust, Fade or Crack. This is an AUTHENTIC 6" X 9" Security Property Sign designed for outdoor or indoor use. This sign will stop crime before it happens, protecting your family and property. Showing your property is professionally protected will keep away 99% of would be thieves.