What exercise increases the width or breadth the upper part of body?

Things that: work the chest, shoulders and back. This would include exercises like bench press, pushups, cable crosses, lateral raises, military presses, bent over rows, pull/chin-ups, seated pull down to name a few. Don't forget, if you trim your waist by optimizing your diet, this will further accentuate the width of your chest, shoulders, upper back.