i am 6'4" and like 175 and blk dnm in a large fits great, same with Rick Owens intarsias, and I havea toj for sale that the sleeves are just sliightly long on me and would probably be perfect for you if ur interested.
To my man who suggested sizing down on the u-necks, I think leclutch James, thanks lol. Made me crack open that PayPal. Picked up midnight, comix grey, comix white, olive, grey, dune, and waiting for black to restock in M. Mind you im 6'4" 175-180 and the fit on a M is great for a more slim styled look. Thinking about scooping the dune villain then waiting for some new colors in stuff.
Just out of curiosity I have a blistered lamb high neck intarsia that is pretty thin. I love it bc I have heavier biker jackets for the cold but I'm just wondering will it hold up well? Or does the thinness compromise the integrity?