I had similar issues with my Shark. Felt great when I tried on at the bike show, ordered one and the same size was way too big. Sent it back and got a smaller one, all was good, or so I thought. After about 30 minutes riding the chin bar was pushed against my lips and it starts getting uncomfortable. I've been wearing Shoei's since I was 16; so I went back to them. They've always fit my head well. I see other helmets out there that I'm curious about, but don't wan't to spend $300 - $700 buck to find it doesn't fit my head right 30 minutes or 2 hours into my ride.