Measuring Head Size
If the distance from side to side at widest point is more than 6 and 3/8th inches an XXL helmet may not be wide enough to fit your head.
You can do a quick check to see if your head is too wide by cutting a square piece out of a piece of cardboard and sliding it over the widest part of your head. If cardboard cutout is to narrow and will not slide by the widest point of your head you may need to purchase a XXXL or larger helmet. Quiet Ride Helmets are not made in larger sizes. Larger sizes 3XL to 5XL will be available in the future.