The 1920s were a revolutionary time in many ways, including in the fashion world. The modesty displayed by earlier generations began to make way for more revealing styles, which were enhanced by over-the-top accessories like boas, feathers and fringe. The early '20s saw long, cylindrical skirts that fell 7 to 10 inches below the knee, but by the mid-'20s, flapper fashion took over.
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eHow Article: About '20s Costumes for Women