Helmet For Skateboard is an adjustable knob to allow for a better fit. It is fragile so turn it slowly and gently. It can get caught in the styrofoam padding so use your index finger and gently push the end piece down towards the chin straps as your other hand adjusts the knob. The knob should turn smoothly once unblocked. You'll figure out what I mean. I believe that the majority of people complaining about the helmet being too small is because they haven't figured out how to unblock the knob. If you remove the velcro chin strap, you will see that the straps have additional length. Adjust to your size and put the velcro back on. Not the sturdiest strap but it works fine. I added some red reflector stickers all over the helmet for additional visibility. I paid about $15 which I think is a good deal.

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