I'm 5'4 and at 145 lbs at 6.5 months pregnant and the medium was too big. It looked too loose and didn't give the definition around the baby bump that would have made it look pretty and elegant. It ended up looking more like a toga sheet. When I held in the fabric to mimic what it'd look like in a smaller size I liked it though. They didn't have a small in the color I wanted and I didn't want to invest in getting it altered so I ended up returning it. Also, you wouldn't want to wear the dress if you needed to use/ lift your arms a lot because the folded fabric over the shoulder easily pops out of place. I'd recommend having a friend help you fold over the shoulder fabric after you put it on.
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