I'm 5'0" 160 lbs 38C and usually a Large petite in Athleta 7/8 length bodysuits. This is my first bodysuit with a bathing suit profile and I ordered the large petite. The straps are adjustable so the top half fit perfectly with great compression and ease of movement - I love that I can workout in this without a bra! The bottom half I didn't love so much - it rode up deep into my nether regions and is not comfortable. It also doesn't snap closed, so you have to remove entirely to use the bathroom. I kept because this will be great to workout in with sweatpants and my workouts are only an hour.