Smart Two helmet size
In order to find the correct helmet size, you loosely measure your head circumference with a measuring tape as shown in the drawing below.
Please note, that your Smart Two helmet size may depend on your head form, meaning that you may need a larger helmet than stated below, if you have a particularly broad or long skull.
Medium: 51-56 cm.
Large: 55-59 cm.
X-Large: 58-61 cm.