(tl;dr): Id say these are technically a 36x34, but on the universal scale of mens pants they are a slim 36x34. I would recommend for a guy 64 to 66.5 (193-199cm) and 200-225lbs (90-102kg) with average proportions/weight distribution.

Im a tall guy with a slim-medium build. 66 @ 235lbs, for comparisons sake, and Id have to say the weight is fairly evenly distributed (though not very muscular).

I found these to be slightly too tight. I could fit into the pants and button them with minimal sucking in of the gut, but the cut was tight around my buns and thighs (Jah, buns unt thighs) just to the point that my front pockets bowed out slightly, and I would have had a difficult time sticking my hands in my pockets.

For more direct comparison, these were tighter than a Mens Levi 36x34 505 Straight Leg cut (which happen to fit well, maybe even a hair on the loose side). Id akin them to more of a 35x34 on the Levi 505 scale.