Wow, those are awesome collections!
I voted 20+. I don't know for sure without counting them, but that's my best guess. I can't help it, I love buying different bits just to try them out. And my horses are so good about riding in whatever I put in their mouths. I think I could ride them in almost anything. And yet, I am still looking for the "perfect" bit for each horse. I just love bits, can't help it.