I’m 5’10, 300 pounds, post pregnancy (miscarriage). Got a 2XL, was able to cinch it on the first row, then again, I did measure myself and followed the "couple inches smaller” rule of thumb for waist trainers/cinchers. If you’re like me, a little on the larger side, remove the bars in the back of the trainer. Makes a whole world of difference. I’m very comfortable, able to sit, stand, after awhile, I forget I’m even wearing it. The only reason I’m giving it a 4 out of 5 stars is because of the bSee full review