Well, "tad small" might be understatement of the year. That's a pretty noticeable X right around the button. It suggests to me that the jacket is quite tight, But it could also be exaggerated by the rather odd posture in the photo. There is also something odd going on across the chest on the left side (your right).
Thank you for the commentary gentlemen. Jacket isn't tight in the slightest. It is unlined and has no padding, so the various wrinkles, etc might be attributable to that. Than you both for the welcome and taking the time to comment.