please check online first for fitting information. different maker has different fitting guides. if you happen to visit a shop (that sells helmet) but with no salesman (that can give proper fitting advice), you'll end up buying a wrong sizing helmet, hence no fun for the high speed riding. remember, most kedai is just selling helmet, they wont advice you for which and which.

that what had happened to me on my first helmet. end up selling it off and buy a new one. if you have ridden kapchai before, you can choose any helmet as per what you think the most beautiful to the eye, but not (semi/full) superbike. wrong fitting helmet will just not do it.

i was in the same dilemma as you. end up buying new for the warranty (& abs).