If you're going for drastically different looks, having multiple types of curling irons can work well. If you want to use just one, look for one that has interchangeable barrels to give you different sizes/types of curls from one curling iron. Some sets even include clamp, clampless, cone, and bead barrels, such as this 6 in 1 Curling Wand Set from Laluztop.