I bought a size medium. I am 510 and 183 pounds. The medium fit well everywhere except the rise. I could pull the waistband about 2/3 the distance from my bellybutton to my chest. Consequently, these were returned.
Pros
This product is made of great materials and fits to size with perfection.
Cons
These leggings may not hold up well over time, with seams and fabric easily tearing during rigorous workouts or after repeated washing