My Suit just came in.
I'm 6'1" @ 260 and the large is snug but not too tight.
If you like your clothing baggy, It might be a little small.
I can't wear a sweater and thick sweats underneath it, but it will be perfect for under armor or the ninja suit.
If you are less in weight, the large is a perfect fit.
Overall, this suit is bad ass and I cannot wait to shred with it.