Yep, tiny. They don't get bigger but they've taken out TONS of leaves already. I had at one point removed every leaf that had any damage and thought I got them all but a couple weeks later, here they are again.
Thanks, I may have to do that. I was just really hoping to find out what they are. Partly to know, and partly because of the mystery now. The internet has been woefully unhelpful in finding a tiny silk worm that only eats carrots.