Yard sign kits contain a Posted Sign made of plastic and a stake that is 24" tall and has a tapered base for easy installation in the yard. These kits are called our EasyStake Sign kits. These signs have an outdoor life of 5 years at least. Another option is LawnBoss Sign and stake kit. This kit contains a 40 mils thick aluminum Posted sign with a 3' stake. These signs are costlier but last for at least 10 years outdoors.