Step 1: Define patio area
Choose a level site, then rake soil smooth. Place a stake in soil to mark the patio’s center.
Cut a piece of string about 6 ft. long; tie to the bottom of the center stake, measure out 4 ft., and tie free end to the second stake. With that free stake, pull the string taut and trace the patio’s outline in the soil as you walk around the center stake. Remove stakes, then mark the circle with a hose.