The Shred Ready Sesh Helmet Features an improved Fit Pad system offering great protection at an affordable price. New Universal Sizing will take the guess work out of selecting size. We've also added a new, durable, dial-style retention band. Combining the new retention band with a standard Fitting Pad Set will provide a secure, comfortable and personalized fit. If you are new to water sports, or are just looking for affordable head protection, look no further.Shred Ready Sesh Helmet Sizing:Head Circumference Range In Inches : 21.25-24"