As the action sports market has evolved, so has the choice of helmet sizes and styles available. You can now find helmets that range in size from tiny bike helmets for babies to skate helmets for toddlers to XXL helmets for a range of sports. What exactly makes an extra large helmet extra large? In general, helmet sizing looks like this:
Small size helmets are typically those 53 cm and smaller (6 5/8 hat size)
Medium size helmets are generally 54-56 cm (6 3/4 hat size)
Large size helmets are generally 57-60 cm (7 1/4 hat size)
Extra large helmets are typically those 61 cm and above (7 3/4 hat size and above)
Small size helmets are typically those 53 cm and smaller (6 5/8 hat size)
Medium size helmets are generally 54-56 cm (6 3/4 hat size)
Large size helmets are generally 57-60 cm (7 1/4 hat size)
Extra large helmets are typically those 61 cm and above (7 3/4 hat size and above)