This. Also, if you are a 40, a size IV in the shirts is generally tiny. I should know. I got a IV shirt on, sort of - it looked like a compression shirt, and I took it off very gingerly so as to not hulk it. The outerwear, particularly the coats, on the other hand, typically fits TTS or even oversized. I have a size V Merinos coat from No Man, and I could smuggle a case of beer under there. It's cool, but definitely the fit seems to depend a lot on the type of garment.