18ft button exercise. So the pattern is 36 foot outer circle with a 5 foot spread of the inner cones around the middle of the big circle. Come in from the bottom and work in 4 overlapping circles while coming back to the centre each time. I got these cones on sale and they are slick if you are in a turn and your wheel goes over them. You will know if you touch them because the wheel will slide. I might use orange pucks in the future. You have to start somewhere.