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A barber's pole is a type of sign used by barbers to signify the place or shop where they perform their craft. The trade sign is, by a tradition dating back to the Middle Ages, a staff or pole with a helix of colored stripes (often red and white in many countries, but usually red, white, and blue in the United States).
Why are barber poles red, white and blue? - Ask History. The barber poleâs colors are a legacy of a (thankfully) long-gone era when people went to barbers not just for a haircut or shave but also for bloodletting and other medical procedures.