All measurements in the table are body measurements, not actual helmet measurements. Use a measuring tape to measure your head circumference. The tape should sit just above the ears and wrap around the center of the forehead and the back of your skull. The EU helmet size equals the head circumference in centimeters. The helmet should sit as low as possible, and be a snug fit, so that it doesn’t move when you shake your head around.

SizeSizeA-EUA-UK
49XS49 cm6"
50XS50 cm6.13"
51XS51 cm6.25"
52XS-S/M52 cm6.38"
53S/M53 cm6.5"
54S/M54 cm6.63"
55S/M55 cm6.75"
56S/M56 cm6.88"
57S/M-L/XL57 cm7"
58L/XL58 cm7.13"
59L/XL59 cm7.25"
60L/XL60 cm7.38"
61L/XL61 cm7.5"
62L/XL62 cm7.63"