This is Tiamut Scale, which is based on regular Dragonscale/Dragonscale 4 in 1. If you remove all the large rings, you get a loose regular Dragonscale; the same thing occurs if you remove all the small rings instead. 18g wire, L. rings= 12mm O.D., M. rings= 10mm O.D., S. rings= 8mm O.D.