The first thing you should do is check whether the helmet size agrees with your head measurement. However, as every type of helmet has a different fitting, you can check the helmet by wearing it and see if it isn’t too tight or loose. A tight helmet would be hard to put on; similarly, a loose helmet, when not wearing chin straps, would come off if you tilt your head to a side. And remember, even if a riding helmet fits you, its visor should not be lower than ½ inches from the eyebrow level. Otherwise, you will not be able to see what's in Infront of you.