1920s backless dress witness2fashion These loose, backless, wide leg outfits emerged in the 1920s and 30s as resort wear, especially in places like the French Riviera and British coastal towns. They were stylish, modern, and, most importantly, Women 1920s Great Gatsby Dress Long 20s Flapper Dress Vintage O Neck S Flapper Dress Great Gatsby Dress 1920s Dress Art Deco Wedding Net Dress Statement 1930s Dress 1920s Lace Dress Size UK 6 8 US 2 4