Smart Two Helmet Small - BeigeYAKKAY Smart Two bicycle helmets in size Small unite safety and style. You can wear the elegant, cool helmet whether you bike, skateboard or run a scooter. Smart Two Helmet Small fits a head circumference of 51 54 cm. Find out how to measure your head circumference here. YAKKAY's Smart Two Helmet in size Small is the ideal bicycle helmet or skater helmet for both adults, youngsters and children with a head circumference of 51 54 cm. The head