That's odd, and it looks to me you got it a little bigger, but I loaded it on a G8 character and played around, resizing it and all, I'm not getting that effect. I even made G8 invisible and the hair doesn't go past the actual hair shown on the head. Are you playing with the cap of the hair?

I even loaded OOT'S hair shader for iRay, still not getting it.

Sorry mate, wish I can help!

...wolfie