GLOBBER KIDS HELMET GO UP LIGHTS XS/S ( 51-55CM ) MINT We highly recommend measurement prior to purchase. Using a soft tape measure, please measure the circumference of the childs head about an inch above their eyebrows, or the thickest part of their head. If it falls within the centimentre range shown, the helmet will fit. Boost safety for your precious and adventurous youngsters with a high quality helmet from Globber. Strong ABS shell 11 Air Vent design Dial Lock for simple size adjustments 3 Mode LED Flashing light on rear for added safety and extra visibility Sealed Foam pads for maximum comfort and Safety Australian Standards Approved bicycle helmet Light Weight NOTE: The age guide above is approximate. Getting the right fit is very important. To measure your child’s head, use a measuring tape and measure around the widest point of the head which is about an inch above the eyebrows.