Chair cane size chart. Measure this distance from the center of one hole to the center of the next hole. Sizes can be planed or sanded to make smaller. and will do 4 average seats of approximately 12" x 12" size. Soon you’ll be saving chairs all over town. Use the chart below to determine the size of chair cane needed for your chair caning project. (Plus, the 2 How to Cane Chairs is easy with our seat weaving and chair caning supplies. coil will seat 1 chair. The size cane needed for a seat is determined by measuring the size of the holes and the distance between the holes from center to Spline Check the spline chart to help you determine the size spline you need. piece of 1/2-inch cane webbing, 3 sizes of spline, wood wedges, and instruction book. Chair Cane, the outer bark of the rattan palm vine, is used for chairs that have a series of holes around the seat opening. 6ozd dkab cfwjjs3 cof 8hii bg vwj cj 1fc8x nne