"Warning - Private Property, No Trespassing" Sign For Lawn By SmartSign | 9" x 12" Aluminum Sign With 3' Stake DURABLE ALUMINUM. 12" x 9" sign is made of heavy-duty 63 mil thick aluminum and attached to a 3' tall stake. Signs outlast plastic signs, which can be torn off more easily. STURDY STAKE INCLUDED. Unlike cheaper stake signs, these signs feature a bend-proof steel stake with an enamel coating. Compare to extruded aluminum stakes from competitors, which bend easily. GIVE A HEADS UP. Convey your Private Property No Trespassing warning with this sign - before you have to intercede personally. LAMINATED. Graphics are protected from weather and abuse. Graffiti can be cleaned off. Laminated signs outlast competitive unlaminated or overcoated signs. INSTALLATION. Easy to insert into the ground, with no special tools or strenuous digging required. Just push the 3 tall stake down. For hard packed ground, a hammer can be used.