Sizes One size, adjustable XS-L (54-59 cm)* The numbers in brackets indicate the pilot's head circumference in centimetres, which you can determine using a soft/fabric measuring tape. Flybubble Expert Sizing Advice:Wondering if this helmet will fit? The Supair PILOT and SCHOOL ABS helmets fit very similarly. While the manufacturer states a range of 54–59 cm, our team has tested them and found they comfortably accommodate heads from 53 cm up to 61 cm. Upper Limit: Fits up to 61 cm (Carlo’s head size, standard intermediate oval) at the maximum setting. Lower Limit: Fits great down to 53–54 cm (Nancy's head is 55 cm, standard intermediate oval) when tightened up, leaving room for further adjustment. Supair SCHOOL ABS paragliding helmet The SCHOOL ABS paragliding helmet features a mono-bloc construction and great comfort thanks to its inner foam. Its adjustment wheel and adjustable headband allow the one size to cover head circumferences from 54 cm to 59 cm. Like its predecessor, the School ABS helmet offers a wide field of view. The ventilation is efficient: internal air circulation with external air intake. The internal comfort foam is removable and washable. Characteristics Certification: Paragliding CE EN 966 ABS technology materials Air vents Fastening via chinstrap Adjustment wheel for size and fit Adjustable thanks to removable foam and setting wheel One size (adjustable from 54-59 cm) Weight 550g One colour (Petrol Blue)