I ordered these leggings in Purple, orange, and grey. They all fit about the same. I'm 5ft 5, 148lbs. Ordered a medium and they fit just perfectly. Not too tight not too big. They come feeling very stiff. The orange ones ripped in the butt so I exchanged them with no issues. I found that if you wash them first with fabric softener and hang them to dry they are soft and even more stretchy. Since doing that I've had no more rips and wear them every week with no issues.
I absolutely love these leggings! They're like gymshark leggings, but for a fraction of the price. I have a smaller waist, thick muscular thighs, and a big old booty. This makes finding leggings that fit in both the waist and in the hips difficult. I bought two pairs of these leggings and they both fit me perfectly. I highly recommend them. For reference, I bought a size large and I am 5'4" and 150 lbs.