The Shred ready does come in one size where you add shims (padding) to make it smaller. I have a big head, 6 1/2 to 6 5/8 so didn't have to add much for me. The snug adjustment at the back of the helmet helps a lot also. It's easy to adjust - just put on the helmet & then snug up the strap.
I might add that I've never worn a helmet for wakeboarding before so I have nothing to compare it to. Seems to work fine for me.
Again, I'll take some pics this afternoon & post if you want.
(Message edited by ottog1979 on January 12, 2010)