Match that measurement (in inches or cm) towards the brand's size chart. A new helmet should be restricted enough that the "cheek pads" make you search like a chipmunk. They are going to break in! A MIPS helmet uses a Multi-directional Impact Protection System to protect towards head and brain https://howardq012czw1.losblogos.com/38606817/how-andes-scooters-can-save-you-time-stress-and-money