Pryme 8 V2 BMX/Skate Helmet The new standard in protective gear. New shape with better fit and styling ! 13 large vents so cool heads always prevail ! Bonus decal sheet for your own personal customization and 2 sets of sizing pads to mix and match for the perfect fit. Pryme 8 helmets meet all CPSC requirements for bicycle helmets ! LG/XL Fits 57-60cm. SM/MD Fits 55-57cm. XS/SM Fits 52-55cm.