Haberdasher n. : A dealer in small wares, as tapes, pins, needles, and thread; also, a hatter.

Haberdasher n. : A dealer in drapery goods of various descriptions, as laces, silks, trimmings, etc.

Example:
Is there a difference between a milliner and a Haberdasher?

Taxonomy
haberdasher, peddlers, free encyclopedia, small wares, small articles, London, founder, actor, Origin, Worshipful Company of Haberdashers, search, ribbons, English, outfitter, shop, haberdashery, needles, sack.

Defination from the web:
haberdasher (Scandinavian name) would be very close to a mercer (French name). A haberdasher would retail small wares, the goods of the peddler, while a mercer would specialize in "linens, silks, fustian, worsted piece-goods ...