I'm 5'1" 125lbs, bottom heavy and got a size small and it is a little longer than I like but super comfy. The waist is just a little baggy on me too but not very noticeably so I don't look like a pillow case at all but I can kinda feel the empty space sometimes haha

I love this dress!! It's hugs your body perfectly! Not too tight, not too loose. I will be wearing this gem in the fall with thigh high boots. I sooooo wish they would restock this dress in black!!