11+ K2 Helmet Size Chart Pictures. Head size and head shape will help you find the most comfortable fit of helmet and will ensure your head is protected on the road. Use a measuring tape around the widest point of your head (approx.
The size conversion chart below is for reference only.
1 cm above the ears) to get the correct measurement for a helmet. Sizing chart for skate helmets. To ensure proper fit, always try on product prior to purchase when possible. Wearing the wrong shaped or size helmet can lead to increased pressure and discomfort.