Love these leggings! So soft and comfy. I wear an 18 in women's and the 12-24 fit great with some room to spare. Because of the material they keep their shape and they don't get all saggy at the knees or get all stretched out after a couple hours. They fit the same when I take them off at the end of the day as when I put them on in the morning. The waist is where it should be....at my waist, not at my hips. I have washed them a few times and they are the exact same (I line dry all my clothing). Can't say how long they will last before they begin to wear out but for the price I paid I wouldn't complain. If you're not sure, try them. I'm super happy I took a chance and now I'm looking forward to order more in any of the 100's of designs they offer.