Here is a pretty informational video on how Aria wants their retailers to fit a helmet.
How many of you ever bought a helmet and had the sales person measure your head?
Dan
Two weeks ago at the Open house at Modesto Triumph the Arai rep told me to push the back of the helmet forward and if I could get two fingers past the first knuckle between my forehead and the helmet then the helmet was to big.
I've had my head measured...and have measured it myself, and my wife's head, and my dad's, and anyone else I talk to about helmets. Just to give a starting point 59cm Long Oval = Large Arai Signet-Q. Almost went Medium but it was really tight where the large was plenty tight... Even after break-in - the large still fits me right.
Two weeks ago at the Open house at Modesto Triumph the Arai rep told me to push the back of the helmet forward and if I could get two fingers past the first knuckle between my forehead and the helmet then the helmet was to big.
Going with a good modular (all Nolan modulars have metal hinges and metal fasteners) really helps glass-wearing guys. You can keep the glasses on when putting the lid on, then just close the front. The N104 I have is outstanding. And you can get a helmet that's properly sized, may well be you're an XL in truth. Or L...
Not much point measuring unless you have no clue about where to start trying them on. Head shape is an equally important variable and the only test for that is to try the things on.