Head Shape & All Day Fit

Arai Profile (#1281)

Arai Vector (#1279) & Arai XD3 (#1248)

Arai Quantum 2 (#1283)

A good fitting helmet is a safer, quieter helmet. To fit any helmet properly you should position it on your head so the top of the eye port opening is about one finger width above your eyebrows. This will tell you if the chinbar fits the shape of your jaw, and the cranial section fits your head. Pay special attention to the fit around the crown of your head (the part that is contacted by a baseball cap's band). Sizing the helmet to better fit the face instead of the head, will result in a looser fitting, noisy helmet.

Different helmets fit wide, narrow, round, square and oval heads differently (nothing yet for pinheads). Each Arai model offers a slightly different fit. The "Long Oval" (Profile #1281) is very long front-to-back, and narrow side-to-side, offering additional forehead room for those who find that most helmets have pressure points in the forehead. The "Intermediate Oval" (Vector #1279 or XD3 #1248) is a little shorter front-to-back and a little wider side-to-side than Long Oval. The "Round Oval" (Quantum 2 #1283) is even a little shorter front-to-back and a little wider side-to-side than Intermediate Oval. These shape differences are part of the rigid EPS liner, not the soft upholstery. Only Arai offers these specific head shapes to give you a perfect all day, everyday fit. Sometimes you'll need to try several models to find what matches your head shape best. If your new helmet does not fit or feel 'right,' please send it back for a size/model exchange, or refund.

Custom Cheek Pads

Further adding to the customized fit (and safety) of Arai helmets, is the option to replace the "stock" cheek pads with an alternate cheek pad thickness to achieve the proper comfort level. The helmet sizing chart displays the standard size cheek pad included with each size helmet. If there is a problem with the fit around the facial area of your Arai helmet, whether too loose or snug, consider removing the cheek pads and adjusting the fit by replacing with a different size pad. Helmets are a little like boots, in that they will break-in a bit. For this reason, the best attitude to have when fitting is that a helmet should be as snug as possible, without being painful. Questions? Please call us at 800-222-1994 or email service@aerostich.com.

How to Size & Fit Your Helmet

Using a long strip of paper, have a friend measure horizontally around the largest part of your head, about an inch above your eyebrows (see illustration). Measure the length of the strip with a ruler and use the following chart to determine your hat and helmet size:

Helmet Size(strip length) Inches Centimeters Cheek Pads (Arai)
Small(6 7/8"-7") 21 5/8" - 22" 55 - 56 15mm
Medium(7 1/8"-71/4") 22 3/4" - 23" 57 - 58 20mm
Large(7 3/8"-7 1/2") 23 1/8" - 23 1/2" 59 - 60 25mm
X Large(7 5/8"-7 3/4") 24" - 24 3/8" 61 - 62 30mm