In American English, a dress shirt, button shirt, button-front, button-front shirt, or button-up shirt — "work shirt", "business shirt", or "Oxford shirt" in British English — is a garment with a collar and a full-length opening at the front, which is fastened using buttons or shirt studs. A button-down or button-down shirt is a dress shirt with a button-down collar – a collar having the ends fastened to the shirt with buttons.
A dress shirt is normally made from woven cloth, and is typically accompanied by a tie or bow tie, jacket, suit, or formalwear, but a dress shirt may also be worn more casually.