My measurements are chest 34 and waist 29. Im 52 and 120 lbs. I bought size 6 and its perfect. Ive worn it about 9 times and washed it (air dry/hang dry (each time) and washed it twice once hang dry and once my husband accidentally put it in dryer.
Anyway: it fit perfectly, material is thick and I feel like its a sturdy material. I love this swim suit!