If you have bigger breast for sure size up if you're smaller in the legs I think it's pretty true to size tho .
The fabric is super nice and thick! Perfect fit!
I bought a small and it fit perfectly! I'm 5'4, 125lbs, small chested, somewhat bigger bottom. My lower tummy bothers me but with this suit I finally felt confident in a bikini! Since I'm so small up top, I'll probably end up tightening the shoulders to have a bit more underboob, but still cute if I don't. The material is thicker than you'd expect with such a low price point! Highly recommend! I'm gonna check out their other suits.