Race head size problem

[Brittany11101]

Hi,
My problem is that race that I currently use have head that doesn't fit to most of hairs ,every helmets and circlets.
I don't know how to change it and I don't have any experience in things like that.
I'm talking about Anime race  .
I like this race but playing without any hat ,helmet or even circlet and also very limited choice of hair is hard to withstand.