I can chime in with more sizing help one the MIPS helmets since I just received two different ones I ordered during the helmet sale to compare.
So I have a not-small, pretty oval head with a high forehead. Basically an egg head. :lol: OneK’s do not fit me, even in long oval. GPA is generally too round. Same with International. Even several of the CO’s were too round. Definitely get the major forehead pressure thing others have mentioned–back in the day when there were fewer helmet brands to try on, I thought having a headache from your helmet was just going to have to be my lot in life.
The CO GR8 fits very nicely, in a 7 1/8. Many years ago I tried on a CO Hampton and CO Showjumper and they fit me nicely as well. The Tipperary Sportage is also super comfy for my head–I basically forget it’s there.
I bought the TV Lynx in a medium (I’m in the very top of the size range that’s supposed to fit in a medium, but I hedged my bets that it would work, plus didn’t want to get an even bigger helmet for my large-ish head). When I first put it on it felt…passable, once I played with the dial fit. Tried it on the next day and it felt better–not quite as nice as my GR8 or Tipperary, but comfortable enough. It’s also a nice, well made, good looking helmet.
I also picked up the CO MyPS in the wide peak, in a 7 1/8 (same size as my GR8), and it’s definitely on the rounder side and seems to run small. I’m considering exchanging it for a 7 1/4 just to see if that makes a difference, as it was definitely tight enough that I can’t say with certainty that the shape is what’s wrong…it might just be too small. It’s also a nice helmet–the whole helmet and harness and covered in nice soft faux leather, and I think it’s pretty sharp looking. The wide peak isn’t quite as elegant as the Samshield/OneK version, but I still thought it was a pretty helmet. My SO said I looked like a Star Wars stormtrooper in it. :lol:
I’ll update if I do decide to exchange for the larger CO. I’m on the fence about it right now because the TV fits me well enough, and I have two nice, well-fitting non-MIPS helmets that are only a few years old that I should get at least some more wear out of. Not sure I really need 4 helmets right now. :rolleyes: