Each set contains eight sizes: 1/8", 1/4", 3/8", 1/2", 5/8", 3/4", 7/8", and 1". Works best with #30 blades. Combs weigh about the same as plastic combs, but can be sprayed with disinfectant. Wahl Stainless Steel Combs fit Andis®, Oster®, and Wahl® detachable style blades.