I really like having this belly bandit for my summer dresses while pregnant. It hides underwear lines and makes you feel a little bit better about wearing a dress with a baby bump. I am usually a size 27 waist or size 4 so I ordered a small. I wish I would have gotten a medium so i had a little more room. I have a booty and more muscular theighs so if you can relate Id recommend sizing up. The material is nice and thick and really holds everything together. Its a must have for fitted dresses.