I recently purchased an Airoh Aviator helmet. Two things: 1. The fit is "round oval" similar to an Arai. It is not a "long oval" like a Shoei. However, the Shoei fits me better than the Arai and the Aviator is still a comfortable helmet. I wear size large in all three helmets. 2. Don't buy from FC-Moto.com. It is a German company offering good prices and easy shipping to the US. This company shipped me the wrong model and refused to pay return shipping to correct the problem. They were very reluctant to communicate with me after the transaction (I sent multiple emails to get a reply). I ended up having to sell the helmet.