The Garment District and Boston Costume run their semiannual half-off sale Friday through Sunday. Everything but by-the-pound clothing, costume rentals, and gift cards will be marked down. Find everything from contemporary T-shirts and sport coats to bell bottoms and ’80s legwarmers, heels and cowboy boots to masks and wigs. The stores are at 200 Broadway, Cambridge, 617-876-5230 and 617-482-1632. www.garmentdistrict.com and www.bostoncostume.com

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