I looked over the questions section and I am so glad I did. I have a size 28 inch waist and 36 inch hip at their max and am 5'5". I got a size small and it's the best fit. It has a stretchy waist band but it's not overly tight to begin with. The material is soft and prevents anyone seeing through my dress (nude). It has a side 4-5 inch side slit and seems to prevent riding up. It does not fit like a tube and flows nicely with my movements. Great half slip for those low back dresses.