You need to try on some other brands and figure out what shape your head is. The Lidpicker may help as it shows a list of many helmets with bar graphs showing which shape they are. I have figured out my head is in the middle of a round vs oval, leaning more towards narrow (oval). Nothing worse than a constant pressure point on your head. I bought a Shark RSR2 years back that I loved the looks of, but after 30 minutes or so, I had a red forehead.