Thanks for the responses that's what I'd hoped for. I started racing in 2010, but it was just before I could buy a 2010 helmet and was hoping I wouldn't get stuck in a perpetual 5 year cycle, especially as i'm hoping to move up the Simpson ladder a notch and get a sized helmet. I have an odball size head that's exactly between a L and M. Actually my measurement is halfway between 7-1/4 and 7-3/8 and that is usually the split between M and L.