I ordered the Small size and I am 5'4 and 120 pounds. It fits very well (not too tight or too lose) as far as the width and the height just hits the floor when I am barefoot. The velvety material that many Halloween costumes also have can create some static electricity when moving around a lot or taking it off so be careful! I also found this costume to be more green than the blue-green it seems to be in the pictures; I prefer it this way. This costume is going to be awesome and unique this Halloween so I am excited!