I choss MEDUIM size for this helmet and it is the right size for me. For reference, i also have LARGE size Airoh Aviator 2.1 and this is right size for me too. This helmet is light (about 1100g) and provides good air ventilation.
规格图表
A.为获得头盔的适用尺寸,请将卷尺在耳上约 1 cm 处,围绕头部最宽处一圈。
将所得测量值对照尺寸表。