We spoke to experts, as well as one corset fan, on the pros and cons of "training" your waist. Most days, Diana Ringo wears her corset—made from steel bones and cords—under her clothing.

Kim accessorized the luxurious turtleneck maxi dress, which features a dramatic wrapped leather belt to cinch ... complete with waist training belts, which she often shares on Instagram, no ...

But sitting just above it is an interesting detail: a micro leather corset (or it could be a belt!) that is seriously cinching in her waist. Whether it's part of the skirt, a belt or some kind of ...