I am 6'2, 200lbs, typically wear a medium or large shirt depending on fit, 34W/34L athletic cut (big thighs) jeans.
I ordered size II 48/50 (US medium) jacket and size III 52/54 (US large) Post 1995. I was afraid the top would be snug and the pants would sag but while wearing jeans and a tshirt I was able to put both on with a near perfect fit. The top leaves room for slick armor or maybe a bankrobber style chest rig, but no more.
The set arrived in relatively good shape. There was a small repair on the pants about the size of a US nickel and the elastic suspenders were dry-rotted on one size so it crumbled and stays the maximum length. I happen to work for a gear manufacturer so I can get it repaired easy enough.