Royal Enfield Open Face Mlg Riding Helmet With Clear Visor Matt Desert Storm, Size: M( 57-58Cm) Impact Protection, Excellent Scratch Resistance, Anti-Microbial Fabric is available on Amazon. Product Description:- Size for the helmets would be :XS: 53-54cm, S: 55-56 cm, M: 57-58cm, L: 59-60cm, XL: 61-62cm basis head measurement. Kindly ...