My leggings do roll down like that in yoga, I'm a lady. Not very curvy though. I don't size down but in the ones that are very light & stretchy I could, usually there are 2 sizes that fit, pick the one that feels best to you.
It's funny that leggings even are gendered. I do prefer women's pants except sweatpants - mens sweatpants are better, big pockets and a deep rise. But leggings, what is the difference? Do men's have a different gusset?
