Someone else mentioned this being a little loose in the legs and that also rang true for me.  I''m 5''7" 120lbs and the 7-8 was definitely the right pick for size.  I just had to fold the fabric up to make it tighter.

I am 5'2, 127 lbs, 34D-30-36 and the size 7/8 fit well. Tiny bit of flare at the bottom of the leg but otherwise a good fit.

I bought this to extend my swim season. It is comfortable and easy to swim in, in spite of feeling strange being so buoyant. Re size it fits perfectly everywhere but the thighs which are rather too loose. I could not have taken a smaller size but guess that the sizing is made for more athletic legs than mine!

I purchased this springsuit to wear out at a lake.  The functionality of the springsuit is great.  It kept me very warm and then dried quickly when out of the water.  The only complaint that I have is that the neck is a little tight so eventually you have to get out and unzip it to allow the neck some breathing room.  I purchased a size 7/8 but usually wear a 4/5 in clothing.  If I had gone up another size it would have been to big everywhere else.  Overall it is a great springsuit.

Got this for my wife. She loved it. Fits just right.