I have a three piece suit, and I was wondering what buttons do I button and what do I leave unbuttoned. There's five buttons on the vest and two on my jacket. Do you leave your jacket on at dinner with a three piece suit or just unbutton and the same with the vest. Thanks for all your help ahead of time.
Leave the last vest button unbuttoned. You can leave your jacket on during dinner if you want, but you won't lose any points for taking it off. Hardly anyone will care. But do leave the vest on, and buttoned until the last button. I think that will look much better than having your jacket off and your vest open and flapping around. But hey, whatever works best for your comfort; be comfortable and enjoy your dinner. With three-button suits, either button the middle or the top two, never only the top, all three, the last two, or only the bottom. (I've seen them all. Bleah.) Whether or not you button the middle or the top two depends on the lapel: If it's pressed flat, button the top two. If it's not pressed flat, button the middle. "Pressed flat" is pretty self-explanatory.