I’ll give some reference material here. I’m 6’4 and 190 pounds. I typically wear XL to XXL in Iron Heart, the vast majority of my Iron Heart outerwear is XL with a few in XXL where I needed extra length. I could wear a L in a lot of Iron Heart if I wanted something really tight and fitted. I wear Ship John in a large for a Wills, there’s still extra room in the chest at my current weight.
I have a Henry, Tom and Scar from Y2. The Henry is a 44 and has always been very fitted on me, it was almost too tight when I crept up to 210 pounds this winter. I bought the Tom in a 46, if’s definitely big on me in the chest, especially after loosing some weight. I’m hoping it drapes a bit better once it’s broken in, it’s very stiff leather compared to my other two. The scar I purchased in a 44 and would say it’s one of my best fitting jackets. I could layer in it if I wanted to but it looks good without. Not too tight or loose. I find the leather jackets definitely look weird on you when you first get them, you have to let them break in.
Hope that helps a bit.
