Finding Your Size To find your helmet size wrap a flexible tape measure around your head approximately one inch ABUT EWER QLR SRR 6 SIZE Ne Are INCHES 2158-22 2238-2234 2314-2358 24 2438 NEN 61-62 FUGITIVE YR IR YOUTH measurement. If your number falls between two sizes, select the smaller of the two. If you have a SIZE NI 5348 round head, select the larger size.