I ordered the medium, my head size was just on the cusp of small or medium and the medium fits great. You'll think it's tight for a second but that just means you haven't twisted the fit-knob on the back to open it up yet. It doesn't twist or slide on the head, looks great, and I can adjust the tightness of the helmet easily, even with gloves.Unrelated but the box it comes in is pretty fun for my rabbits, they're ripping it up right now while I'm sitting in the living room completely safe from head injuries, good times.Just not fit as Smith. Feeling like i have a potato on my headTitle says it all. ?Bought size large. Able to comfortably wear beanie/skull cap underneath. Able to fit a lightweight knit cap if necessary. Comfortable with easy adjustment using dial. Worked well with non-Smith goggles (no gap between helmet and goggles. First days using this helmet were windy with highs of 22F. No problem with the cold or wind whatsoever. Lightweight with no frills is just what I wanted and received. Also, got at half of normal retail price.This is a replacement for an older GIRO helmet that I’ve had for about a decade. The MIPS technology sounds like a good thing. Hopefully it won’t be tested. But the helmet itself is very comfortable. The Orange could be more neon, for what I like, which is to be easily recognised by my companion skiers. The helmet is great.I had to shorten the chin strap on this helmet at a tailor for $15, but it was worth it instead of returning this item because the strap didn't adjust enough to be snug under my chin. Out of the four helmets I've had this is the most comfortable one yet.I love it! This was a gift for my grandson and it fit him perfectly. Very comfortable on his head and safety secure. Thank you!This was such a great helmet I bought one for my wife the next dayAwesome ski helmet. Comfortable, lightweight and very slimline.Will definitely buy again when I need a new one.Haven’t used it. It looks good and light too. Will go for skiing in one week time, let’s see and very excited!Léger, confortable, bien conçu et on entend bien.Je ne lui trouve pas de défaut.Sitzt gut, angenehm beim Fahren. Passt gut mit Skibrille. Nur zu empfehlen.Works great. Warm yet light and streamlined ??