Manhattan – Midtown West
1008 Sixth Ave between 37th and 38th Sts
Martha Stewart Living editors and Seventh Avenue designers regularly troll this vast notions depot, which is jam-packed from floor to ceiling with boxes of myriad buttons (from 19 cents), sparkly iron-on appliqués ($5 and up), chenille cord ($1--$6) and peacock-feather fringe ($16 per yard), along with anything you could possibly need to embellish fabric. Paris Hilton fans, don't miss the kitschy kits ($20) that will help you trick out your Sidekick with rhinestones.
Find more shops at Time Out New York.