Universal Bike Helmet Men and Women Specialized Road Bike Bicycle Adjustable Riding Helmet Note: All dimensions are measured by hand, there may be 1-3 cm deviations. Due to the lighting and monitors, there are slight difference between the picture and the real item. Please note that slight color difference should be acceptable due to the light and screen. Specification: Material: EPS Foam + PC + PP + Nylon Size: Head circumference: 54-61cm/21.26-24.02inches Gender: Women, Men Style: Safe, Practical, Fashion Package included: 1x Cycling Helmets