Wm. Booth, Draper: Linen and Woolen Draper, Haberdasher &c.
On the page above you'll find links to more pages with photos of linens (bleached, unbleached, checked, striped), wools, broadcloth, worsted, flannels, silk, cotton and more. There are notes on what sorts of persons could have afforded which grade of cloth, and many of the photos include snippets from historical advertisements for runaway servants and slaves, detailing what they were wearing at the time of their abscondence.
There are pages for buckles, buttons, thread, lace, yarn and needlework tools.
There are pattern pages for women's shifts, chemises, gowns, bonnets, caps and stays. And men's shirts, breeches and trousers. Childrens clothing too. And knitting!
If you're looking for more references for 18th century clothing, there's a bookstore.
I'd love to collect links for more such sites to create an 18C resource page. If you have a favorite, please leave the link for it in the comments, and thanks!
spinner photo: wallyg (flicker)