I am 5' 10" 135 lbs, normally a size 4l and ordered both a small in the navy and a medium in the beige. the elastic waist on both is not a tight/ muffin-top producing elastic like on some thinner banded leggings. in fact, the elastic is very loose, not very stretchy on either of the sizes. i think the s had been previously tried on, given the state of the packaging and the fact that the seat of the pant was already a bit stretched out. the m is definitely too large so i would say that these run