I'm 6'3 and nearly 300 lbs with a 44" waist. I ordered the 3X. I wanted them a little big in case I wanted to wear them over pants. They are snugger than what I was expecting from a 3X, They fit like a 2X. Still very useful for me. The other issue is that the suspenders are a little short. Even full extended they was nug in the crotch. If they were an inch or two longer, these would be about perfect.