Match that measurement (in inches or cm) into the brand's size chart. A different helmet should be tight more than enough that the "cheek pads" make you glimpse like a chipmunk. They're going to break in! Most of your time, a crash is not even the rider's fault. According to https://zaneqkbrg.blogdigy.com/rumored-buzz-on-alpinestar-motorcycle-gear-62594119