Maggie Tang 50s Vintage Detachable Halterneck Swing Rockabilly Ball Gown Dress The size is not a big size, please read the size chart in the product description carefully ,if you are not sure of the size, one or two size up is a good idea. 100% cotton . Classic and iconic style that will never be out of fashion . This swing dress has a really full circle skirt . Get the full 50's look (as in the main picture) by wearing with a 22" length petticoat, available to purchase separately. Petticoat not included. Designed by Maggie Tang!