Stetson Derby The Fair Chicago

So my great uncle passed away a few years ago and I acquired a bunch of what seemed to be junk. So being the procrastinator that I am I never went through any of it. So long story short my wife said throw it out already so I decided to go through it and I came across this hat. I can't seem to find anything of this "The Fair Chicago" hat. Its beautiful unfortunatly my head is huge. I would like to know more about it if anyone is able to help. I do know that in the same box there was a ticket stub from the Chicago's World Fair now if it was bought then I do not know. Any information would be greatly appreciated
Thanks