Not to pick on a relative newbie, but, either your stance, the angle of your photograph, or the very low button stance of your DB blazer seems to be emphasizing whatever girth you have around the middle. If there is excess girth, my apologies (been there, done that - I'm down 35 lbs. from my heaviest): if not, you might try a single breasted blazer next time.
The hat is fine - perhaps photographed at at less-than-optimal angle, but the season is early yet - I am sure that you'll have the chance to wear (and photograph) it again.
You are right. I have some some excess girth around the middle (But I'm working on that). And the blazer has a quite low button stance, probably my position does not improve the result though. I'm still looking for an affordable DB blazer and some lighter SBs too. The only SB blazers I own are very heavy, I would have cooked wearing them yesterday.
If the hat does survive long enough, I'll potograph again.