Hat-making or millinery is the design, manufacture and sale of hats and other headwear. A person engaged in this trade is called a milliner or hatter.
Historically, milliners made and sold a range of accessories for clothing and hairstyles. In France, milliners are known as marchand(e)s de modes (fashion merchants), rather than being specifically associated with hat-making. In Britain, however, milliners were known to specialize in hats by the beginning of the Victorian period.