I was a little skeptical of the sizing after reading various reviews, but decided to listen to the majority saying that this runs really, really big and went with a small. I am 5'4" and about 160ish lbs. I have a tiny waist and a thicker lower half so I usually wear a 8-10 bottoms, medium top, and usually wear a M/L in sets like this. After trying this on, to my surprise the small fit PERFECTLY. The top is a bit wide and without tape I would've had some nip slips, but tape sticks well to thiSee full review