hatter:
(plural: ‘hatters‘)
(old usage) a maker and/or seller of hats, especially for men;
a hat maker,

a hatter (R) making a hat for her customer (L)
Perry is a famous hatter in town; few tourists to our historical town fail to visit his hat shop and buy a fabulous hat as a souvenir.
London is the home of several world famous hatters and milliners who have been in business since thirteen century!
‘As mad as a hatter’ is an idiom which refers to a person who is eccentric or crazy because there is a belief, without much scientific evidence to support it, that hatters used to be moody at times because of the mercury chemical they use in hat making.
‘Mad hatter’ in the present usage is a phrase used to refer to a person, especially the present British generation including the royalty, who is obsessed with ridiculous as well as fabulous hats and caps.
