A hat is one of the most personal pieces of clothing/accessories that one can wear, so why not invest in something that will fit no other head but yours?
BTLNews.com December 2011 feature an online article interviewing J. Edgar costume designer Deborah Hopper. In the interview Deborah spoke about hats courtesy of Worth & Worth that was used for the movie.
A hat is one of the most personal pieces of clothing/accessories that one can wear, so why not invest in something that will fit no other head but yours?