It definitely looks a little tight, especially the shoulder area, but it looks alright when it's open. Probably stretch a little bit too, though that leather looks pretty serious. Stooges is a jacket I'd go a half size up rather than down in - aggressive jacket like that still looks pretty good when it's oversized and you can throw something under it as well.
Here's a fit from Fuuma that inspired me to get the jacket in the first place and myself in a Stooges just for comparison
Warning: Spoiler! (Click to show)
I can layer a lot under mine as I use it in winter, maybe too oversized for what he's going for (I have much tighter RO leathers), I think he should return his though, seems just uncomfortable.
note: I don't believe in stretching clothes, they have to fit nicely when I buy them.