A haberdasher is a person who sells men's hats.
A milliner
A realtor
Textile Merchant
Retailer or contractor
Retailer/clothier/tailor.
A milliner
A milliner.
A person who sells ribbon and hats is typically called a milliner or a haberdasher.
Womens hat maker: milliner Mens hat maker: hatter
http://www.skis.com/mental/b331/mens-ski-hats/c748/
A hatter.
a Modist
Milliner
fred Jones
Milliners make women's hats. Men's hats are made by hatters; e.g., the Mad Hatter in Alice in Wonderland is a maker of hats.
A realtor
The store "Lids" is a specialty store that sells hats and caps at their online site. Lids also has retail stores at many malls across the United States. Lids offers over 30,000 different products on their website.