This 20' diameter yurt is the biggest we've attempted. The center ring is between 9 and 10' tall and is supported by (36) 9' rafters. We spanned the 60'+ perimeter with two lattice wall sections. The weatherized vinyl covering includes 3 transparent skylights for sunlight in the winter. The structure is quite spacious within and the walls are insulated with a fleece lining. This large Ger has proven very functional and comfortable in the strong spring New Mexican winds.