Stretch Denim Shirtdress

I originally ordered a Size Large, according to the sizing chart on Habitual's own website. I also tried a Medium. The Large was much too big. The Medium was not fitted and not flattering on my 5'2.5" 120" lb frame. For additional reference, my waist is 29" and I'm 36C. I then ordered a Size Small. It fits at the top and waist, although the top wants to gape at the bust, which I think I can remedy with adding a small, hidden snap inside. The hips are a bit snugger than I like. It is a heavier weight cotton denim, very good quality. I'm on the fence about keeping it. It fits almost perfectly, and I'm still planning to lose about 4-5 more pounds to get to my goal weight of 115-116, which I think might help. I ordered both the blue and the black, and like both.