For me personally, as soon as I feel that I can’t keep an eye on everyone safely, the class is too big. But this is dependent on the participants and usually the number of novice bootcamp/class participants. For something like boot camp, I generally cut off the enrollment at 20. That is pushing it a little, but if I have a class that big, I really go into extra high monitoring mode. Which is pretty high already as I really focus on monitoring participants.