You can adjust the frame to accomodate different blade lengths, and there are different sizes of blades. The ones I have are size 2/0, which is pretty tiny. They are about the size of a piece of floss:
I have a lot of practicing and experimenting to do! There are different blade sizes to try, as well as testing it out on different gauges of metal. Here's my first attempt:
It's not the worst thing I ever saw, but I can tell that I need a lot of work and fine-tuning. This copper is pretty thick, so next, I'm going to try using a thinner gauge. I'll let you know how it goes!