I purchased this suit as part of my Halloween costume. I am 5'4" about 125lbs and I am a 34C bra size. I was very unsure of what size to order, considering the sizing is not as easy as S, M, L. After searching online for what an appropriate size for me would be, I settled on a size 30 (a website said that this is about a dress size 4-6 in Andoretex). The suit arrived on time, in a sealed package, and with tags. I immediately tried it on and I am relatively satisfied. The quality of the suit is pretty good. The sizing is okay, it is a little bit tight, but nothing too uncomfortable. If I could go back in time, I definitely would have ordered the 32. My chest seems to spill out a little bit. If I had a smaller chest, it wouldn't be an issue at all. The suit also sits quite high on the hips, which is a little higher than I expected. Overall, I think it was a good purchase for the price and it will serve its purpose. I recommend getting a size up if you think your chest will be an issue!