Pro-Tec is the original action sports protection brand, and the Classic Skate Helmet is where it all began in 1973. With top-of-the-line protection and Pro-Tec's unmistakable style, it keeps getting better with age. The often imitated ABS shell offers high-impact protection and an iconic, low-profile style. On the inside, our two-stage foam liner and the newly added EVA crown pad keep things comfortable and lightweight, making this the style of choice season after season. And since all of our products are designed, tested and inspired by our professional skate team, the Classic Skate can help you take it to the next level. For accurate measurements, wrap the measuring tape just above your eyebrows and around your head. Compare your cm measurement to the chart below to find your ideal helmet size. Size Head Circumference (inches) Head Circumference (centimetres) XS 20.5 - 21.3" 52 - 54cm S 21.3 - 22" 54 - 56cm M 22 - 22.8" 56 - 58cm L 22.8 - 23.6" 58 - 60cm XL 23.6 - 24.4" 60 - 62cm XXL 24.4 - 25.2" 62 - 64cm