The AR-1 is available in sizes S-XXL. With an intermediate oval shape similar to the Shoei RF-1200, the AR-1 is a tighter race fit.
To determine your helmet size, please complete the following steps:
- Measure your head size with a measuring tape. Ask a friend for help to get the most accurate measurement. Begin about 1 inch (2.5 cm) above your eyebrows and wrap the measuring tape all the way around. You want to measure the largest part of your head.
- Find your head measurement on the sizing chart below. If your measurement is in between sizes, we recommend selecting the larger size because the AR-1 is close-fitting.
SIZING GUIDE:

Before riding with your AR-1, please try it on and check the following:
- The fit is a little tight. The AR-1 is a race fit and is meant to feel snug. If you can easily move the helmet around with your hands, it’s too big.
- The helmet should sit evenly on your head and you should feel the top comfort pad pressing on the top of your head.
- You cannot easily slide your finger between your temple and the helmet. If you can, you need a smaller size.
Email our Customer Care team at connect@skully.com to let them know if your helmet doesn’t fit or if you have questions about sizing. We will ship you new premium comfort pads to achieve the right fit, whether it needs to be smaller or larger.
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