Arai helmets tend to fit on the smaller side. I’m usually a Large but this one is XL. The helmet is a Quantum X which is the ‘oval’ fit in the Arai lineup. The pinlock visor accessory (anti-fog) is already installed. I can’t seem to find the date of manufacture but I know I bought it after the start of Covid so it’s probably 5 years-old and hasn’t done much service in that time. I’m a bit of a nervous-Nelly and usually replace helmets after 5 years.