For reference I am 5'8 and weigh 135 lbs and got a S/M. This thing is tightttttt at first - really need to stretch it out as you put it on but it's easy to stretch and once it's on it fits like a glove. Snatches you up in all the right places and is very flattering! I also had a baby a year ago and let's just say my boobs aren't what they used to be.....but you don't even need a bra or any lifting device with this. It keeps the girls in place and smooths everything out. Love love love this and cannot wait to wear it to the Electric Forest in June! The only thing I dislike are the gloves - they don't fit as tight as shown on the model and are very loose on my arms. Going to try throwing them in the dryer and hope they shrink because it really adds so much to the outfit. Will definitely return to Rave Wonderland for all my future rave outfits!