I wear a size 8-10 and I went with a large. It draped okay and was warm enough. I did have to pin it up (the gold neckplate hides the pins) because it was a bit long on me but I wouldn't go down in size since I'm curvy. I think it makes a fine Egyptian Queen. I made my own crown of the headpiece to be Nefertiti instead of Elizabeth Taylor's Cleopatra. One note, the blue flowy thing stays wrinkled. The care label says do not iron and I believe it. So I'm not sure how those wrinkles would come out. I still liked this costume well enough.