This is your ultimate disco dress, it sparkles and has the right amount of stretch to dance all night. I bought at a vintage store; previous owner added a handy back strap that holds the dress in place to avoid wardrobe malfunctioning. Knee length as shown on mannequin, it looks very elegant yet party on when worn. I wore it twice and it was a showstopper both times. The size is a true 6; unlike some of the vintage garments, it does not fit small. Would fit size 4 too though.