At 22.25" I always struggle with bike helmets. In Lazer and Giro the large is too big but the medium is too small. The medium POC fits me just perfectly with no side-to-side or front-to-back wiggle. Finish is very nice too and all the parts feel like quality. I've ridden this in 95 degrees Farenheit and I was wet but comfortable. Best helmet I've ever worn.