XSF manufacture circle truss in any diameter required using any of their standard truss sizes. Circles vary from 5' diameter to as large as 120? diameter based on your needs. Standard sizes are 10', 20' and 40' diameter. Truss sizes available include 10", 12", 16", 20.5", 30" and 36". All truss sizes can be manufactured into circles using ladder truss, triangle truss or box truss.