Oops, one other thing. The RocLoc 3 or 4 or whatever that are in the Giro E2 and the Havoc seem to adjust better to my itsy-bitsy head.

I just looked at the Havoc and is size it is a size S and 52-56 cm, but again it is a 2001 model. I think Giro changes their sizing from year to year so you need to know the centimeters.