If you have a very small head, or know a woman (in my experience, 99.9% of XS fit women or small children) who may even need a XXS helmet, Arai Helmets has just released a new street helmet called the DT-X.
Supposedly it will offer a XXS size, per the website. However, they have the same information for the Vector-2 which was never offered in a 2XS that you could actually order. The only 2XS helmet available to order from them at this minute is the Defiant (although it's currently OOS).
I miss my trusty Arai, but it didn't fit me small enough like my Shoei does. I'm hoping if they do offer a 2XS that it'll fit my head! I've always respected Arai and their design / protection philosophies. They defy mainstream expectations and always strive to deliver the most protective helmet even if it means not having the best selling helmet, or the one that everyone thinks is "coolest".
But if you are looking for a Full Face or Modular 2XS Helmet, these are the ones that I'm aware of:
- Arai Defiant and Defiant Pro Cruise (certain colors)
- Icon Airmada (certain colors)
- Nexx XT1 Carbon Zero
- GMax GM38
- Nexx XR2 Carbon Pure (currently OOS)
- Shoei Qwest (black only)
- Shoei RF-1200 (if you purchase the 17mm Centerpad, then it's a 2XS)
- AGV AX-8 DS Evo
I have to mention the Bell Star (Street Star, Race Star and Pro Star) Helmets, because they fit so narrow. I can barely fit my head into an XS (that I can fit into pretty much every XS helmet) and the S fits like a Shoei XS. I'll bet that an XS fits like a 2XS.
- Schuberth C3Pro Women
- Nolan N104 Absolute