"Tattersall" is a word I should have looked up years ago. I always assumed it was related to "tatters" when I saw it describing clothes and fabrics. A.Word.A.Day finally told me differently; it means a pattern of squares formed by thin (pinstripe or close to it) lines against a different color solid background. The lines don't have to be all the same color. (Actually, A.Word.A.Day's definition specified dark-colored lines against a light background, but a Google search revealed an Amazon listing for a shirt described as "tattersall" that had pale lines against a charcoal gray background, so the pattern seems to be more important than the particular colors.) Though tattersall fabrics can be used for anything, my searches reveal the pattern to be most seen on men's shirts.
The name comes from the horse blankets at Tattersall's horse market in London, which commonly had this type of pattern; Merriam-Webster dates the word at 1891. Richard Tattersall (1724-1795) was the auctioneer who founded the market in 1766 (one site says it was the world's first horse market, and it's certainly still in existence as "an international firm offering 10,000 horses each year at 17 sales at Newmarket in Britain and at Fairyhouse in Ireland."), and his name has passed into English not only as the fabric pattern but (according to Roget's Thesaurus 1922) a synonym for marketplace, and throughout Australia a name for sportsman's clubs according to wordreference.com, though tattersalls.com.au says their lottery is named after a different Tattersall.
Tattersall is also the name of a publisher, who offers "book design and production, offering self-publishers and other small presses high-quality design, printing, and binding at affordable prices." And montecarlo tells me "There used to be a restaurant in central Stockholm named
Tattersall. It was a nice place, but I don't know the background of its name."