Originally Posted by
surak
I just bought a Bontrager Ballista sized small because I was between that and medium, and it ends up sitting slightly too high over my temples like OP is worrying about with his helmet, though in my case it's because my head is wider than it is deep. I think the medium size would be too big though, so I'm fine dealing with the helmet otherwise.
I tried out a ballista size medium, and it fit fine in terms of being comfortable, but it just sits so high up on my head. I tried the small, but my head is too long front to back. Side to side was fine.