A big circle with usually some sort of symbol or pattern there, could be embroidered, could be metal, might have tassels coming off of it. I have no idea what it's called and am trying to find it. I thiiiink it was worn by warriors.
Help me please!
EDIT: Could be Japanese?
EDIT 2: http://imgur.com/r2NyXOP
More information needed. Do you have a picture? If not, you're probably never going to get an answer.