Tall & Thin:
The tall and thin groom can wear just about anything (we're talking about tuxedos and suits here!). He can wear just about any color and style. If the groom is very thin, he can try a double-breasted jacket. This will give him a little extra padding in the chest area. If you want to look broader in the shoulders, ask for more padding in the shoulders. A pleated shirt will also look great on a very thin groom.
Short & Thin:
A short and thin groom should NOT wear double-breasted jackets. He'll end up looking lost in it! A three-button jacket with pleated trousers or tuxedo pants is a great look for that short and thin groom.
Tall & Broad:
The tall and broad groom should also stay away from the double-breasted jackets. It will just make him look more husky. He should also avoid pleated shirts. Also, if he's had one to many brewskies, he should wear a vest rather than a cummerbund (the cummerbund will draw attention to his waistline and the vest will hide it).
Short & Broad:
The short and broad groom should wear a single-breasted jacket. A one-button or two-button jacket that closes near his waistline is a perfect choice. Once again, if he has a large waistline, he should wear a vest rather than a cummerbund. Padded shoulders will also draw the attention away from the waistline up to the shoulders.