To call a fashion wearable is the kiss of death. No new fashion worth its salt is wearable. [Eugenia Sheppard, "New York Herald Tribune," Jan. 13, 1960]
Fashion plate (1851) originally was "full-page picture in a popular magazine showing the prevailing or latest style of dress," in reference to the typographic "plate" from which it was printed. Transfered sense of "well-dressed person" had emerged by 1920s.