Electra Unicorn Lifestyle Bike HelmetA Responsive Email Template Ride safe. Ride majestic. Helmets don't have to be boring. Fortunately, boring isn't in our vocabulary. Choose between awesome colors and graphics that fit your style. Product details Durable ABS hardshell for protection and EPS foam liner for security Size small fits circumference 48 cm 54 cm and hat sizes 6 1 2 6 3 4 Small size generally fits children while medium and large sizes fit adults