Three of my kids go to regular school and two are in elementary. My sons are in second and fourth grade and I think they both have around 18 kids in each of their classes. It's a nice size, IMO.
The schools here have been really working on the bullying, too. I have had to talk to staff a few times, but it seems as though it isn't as bad as it was when I was a kid. There have actually been kids suspended over my complaints, so they aren't just telling me what I want to hear to make me go away.
US schools have a pretty bad rap and I was reluctant to enroll my kids in them, but three out of the four have done okay so far. I only have one at home now.