Ordered a M. Waist 27. Unstretched measures 24 3/4" waist. Fit is comfortable. Works great with the dress I purchased it for. I did have to slit the side seams and sew in a triangle panel on both sides to allow for kicks. If you are not dancing, you will have no issues. For high kicks, the inner lining is not large enough. Also, my dress is slippery. Putting this under a cotton dress didn't work as well as I think the netting grabbed it. Spins were sort of lop sided. I paired this with the GownTown 1950's Vintage Dress.