The most important factor in choosing and wearing a helmet is the size of your head.

        Since each person has a different head shape, the consumer needs to have an accurate measurement of his head before buying the helmet. Measuring head dimensions, which is measured from the brow to the head size of brain. Choose the helmet, need to choose their head circumference size is larger than the 2~3cm helmet, so make yourself wearing the most comfortable.
        The following is to provide JDS size table, can help consumers understand their own suitable to wear what size helmet: