I have a 44 waist and 52 hip, size 18-20 in US and the 3x size fits fine going over both. The elastic is a little tight but I can see its to hold the skirt in place as if it were loose fitting it might start sliding down. The material is heavier than I expected but makes the skirt feel more regal rather than limp and transparent. Its made from quality fabric and with the sash there are several ways to use it.

Downside is its very long. At 56 at high waist its at my ankles. Its long enough for a solo cocktail dress.