9cm is not that much for lapel width, imo, so I'd say the pocket flaps are proportioned accordingly. Are you familiar with the rule of three? You could measure the lapel-width from pictures and calculate the actual flap size. I don't know how important your need for the info is, though, so you might just rely on your eye and decide wether it looks good or not.
12/27/13 at 4:34am