What generic word/phrase can I use for materials like zipper, buttons, threads and needles, etc which are used in making clothes?
I want to use this word to describe a shop which sells these things.
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In the U.S., zippers, ribbons, buttons, etc., can be found at a craft store, or at a fabric store.
A fabric store will sell other material for making clothing. You'll find the walls lined with bolts of cloth, and a section where you can buy sergers and sewing machines.
A craft store will sell little if any fabric, but will sell glues, paints, scrapbooking supplies, etc., along with the aforementioned items.
There are places where you can get all-of-the-above, all under one roof. If so, the business might bill itself as a fabric & craft store, like this major U.S. retailer.
In UK English (also Australian and NZ), a shop like this is called a haberdashery (see http://www.thefreedictionary.com/haberdasher). Unfortunately, this means something else in North American English; I don't know a good answer for a shop like this in USA or Canada.
On the west coast of the US, there are a number of retailers known simply as fabric stores which sell all manner of accessories and devices related to making your own clothes at home. Including patterns, sewing-machine attachments, sewing needles, buttons, bolts of fabric, and whatever else you can think of. Businesses which make clothing to sell are called textile factories.