I've told people that the blades I used are as small as a regular sewing pin, but both are so small, it's kind of hard to know for sure without really really zooming in. So out of curiosity, I scanned the smallest blade I commonly use. I assumed I would get a profile view, but was thrilled to see the front which give an idea of the actual kerf. I can't really see the teeth with the naked eye, so it was nice to get a zoomed image.
Anyway, I though this was really neat, hopefully you will also. Click the picture below so see full size, so you can see the teeth.