I ordered these in the black and grey colors. For pants in general I'm a size 16W. I purchased these in the 1x and 2x. The 1x fit right at the waistline but the legs thigh/leg area was too tight on me, I felt compressed. I tried on the 2x and they fit just the way I like them in the thigh/leg area, not
loose, just comfortable. I'm 5'6" and the fabric does down about 3 1/2 inches below the knee so I'm very happy with the length as well.
In wearing the 2x the top of the fabric goes way up, covers all my tummy area and goes up to about 6 inches below my bra line, which may not be what some people would want, but you could fold it down from the top if needed.

I won't be using these for working out but for wearing around the house or doing quick errands around town. Paired with a lounge type top that covers the tummy area and rear I think it looks fine. I've washed these several times on gentle cycle and immediately hung them to dry, no shrinkage. They don't loosen up or get baggy on me throughout the day either.