RALEIGH DB DIAMOND BACK BMX JUMP HELMET MATTE PURPLE MEDIUM 54-58cm 35% OFF RRPTHIS IS A GREAT TOP BRAND HELMET FOR BMX, SKATEBOARDERS, IN LINE SKATERS ETCDIAMONDBACK HELMET FEATURES BMX STYLING AND OFFERS A LITTLE MORE PROTECTION THAN STANDARD TRADITIONAL POLYSTYRENE CYCLING HELMETS WITH ITS CLASSIC AND ICONIC SHAPEALL INNER PADS ARE WASHABLE AND EASILY REMOVEDMAIN FEATURES:FULL HARD SHELL CONSTRUCTION11 AIRFLOW VENTS FOR FULL 360 DEGREE VENTINGSOFT TOUCH WEBBINGNEXUS CHIN BUCKLEICONIC BMX/DIRT JUMP SHADECAM LOCK SIDE STRAP ADJUSTERSBRAND: DIAMONDBACKCOLOUR: MATTE PURPLESIZE: MEDIUM 54-58cmPART NO: DBX610MWEIGHT: 377grams (approx)RRP IS A REAL BARGAIN AT 19.99 AND WITH 35% OFF ITS A REAL STEAL SO BUY NOW WHILE YOU HAVE CHANCESIZING FOR HELMETS; So you can check the size you need it’s essential you measure the users head correctly. To measure for a helmet you need touse a fabric tape measure (or a piece of string you can then measure).Use a tape measure to determine the circumference of the head. Place the tape measure/ string above your ears and about an inch (2.54 cm) above the eyebrows.Try not to wrap the tape too tightly take your time and take a few sets of measurements to find the common average.If the size in CM is within the sizes as listed then the helmet will fit, if it does not or you have doubts please contact us and we will advisethe helmet/s we have to suit.