Please choose your C3, C3W, C3 Pro, C3W Pro, E1, S2, or M1 sun visor size according to this list:
Helmet sizes XX-Small through Large (all sizes of M1) = Small shield
Helmet sizes X-Large through 3X-Large = Large shield
Please choose your C4 sun visor size according to this list:
Helmet sizes X-Small through Small = Small shield
Helmet sizes Medium through XX-Large = Large shield
Please choose your C4 Pro sun visor size according to this list:
Helmet sizes X-Small through Medium = Small shield
Helmet sizes Large through XX-Large = Large shield
Schuberth C4|Pro|C3|Pro|E1|S2|M1 Sun Visor
Produced by Schuberth of Germany