What would you wear with it, if used as an odd jacket? White on blue check is very striking and I'm struggling to think what would work with it. Beige/cream trousers are an obvious choice, but I'm assuming the jacket is a bit too heavy for summerwear (I suppose white flannels might be an option in winter though). Pale grey trousers? Maybe, but not ideal. All the usual darker/saturated autumn/winter colours aren't going go well IMO. If the jacket had an earthy check, I'd say sure, wear it as an odd jacket. But the off-white check makes it really tricky I think. Best off as a suit, and obviously it's a very eye-catching suit. For me, it's one of those items that's kind of cool on others but I'd find pretty tricky to integrate into my own life. Obviously, ymmv.