this would work well for someone who is very thin and not curvy. I wear a 12-14 in pants and a M/L in tops. I weight about 170-180lbs

So I bought this in a size up after reading the reviews but I think my regular size of a large would have been fine! Because it’s too big but since it’s a body suit, I couldn’t return it’ll. Sucks that that’s a thing! I’m 5’5, 180lbs and wear a 36 DDD bra. My waist is about a 35 and my breast measurement is about a 42. If you can relate then a large should fit perfect. It does have some stretch to it.