i'll start: my schooling helmet is an ovation schooler with the dial. it fits alright, there's some room at the sides near my temples. my old show helmet is a CO jr8, although new COs don't fit me - definitely too much room on the sides, and i think there was empty space above the crown of my head. i /have/ had mine for 9 years, so there's a good chance the interior was worn into the shape of my head lmao. or my head changed shape. my new show helmet is a samshield, which i SWORE to never own because they look elitist, but it was the only one at the tack shop that fit.