Measuring the head is only a starting point for the entire sizing procedure. Due to varying shapes, heads that are apparently the same size when measured by a tape may not necessarily fit the same size helmet. . Size Comparison Chart . Get first dibs & start your holiday’s early, HUGE BRAND SALES & HANDPICKED PRODUCTS with deep discounts. Check Out the Bell Helmet Size Chart – Free . Ski, Snowboard, Wakeboard, Skateboard Gear & Clothing: Enjoy Free Shipping, Low Price Guarantee, Product Reviews, Shopping Tools and a little flavor. Bell Helmets Size Chart, Get the Right Fit to Suite You. With a wide range of Bicycle Helmet types & designs catering to all cycling categories, Bell Helmets is a world leader in cycling helmet design & technology. . Float Fit Integrated with MIPS. No Twist Tri-Glides, Sweat Guide. Elegant Shape. Bell bike helmets for kids offer maximum protection & cool graphics, allowing your kids to have the greatest biking experience. Shop youth bike helmets here! Size Chart for Bell Custom 500, Qualifier, Qualifier DLX, MX-9, MX-9 ADV Models Only. bell-qualifier-dlx-size-chart.jpg. Size Chart for Bell Vortex, Revolver Evo, . Bullitt, Mag-9, Moto-9, Revolver EVO, Rogue, SX-1, Vortex. Size, Circumference (cm), Hat size (in), Cheek Pad Size (mm). XS, 54 -55, 6 3/4 – 6 7/8, 45. S, 55 -56 .