Actually, hardcore stylists condemn this practice, saying that the cummerbund should never match the tie, rather merely compliment it. I never bother with this rule personally, and usually wear a black satin (self-tie, of course) bow tie and matching cummerbund, but still, traditionally, this is something of a faux-pas.
Black Tie Optional (or Black Tie Invited) allows hosts to suggest that men wear tuxedos but not to insist on it. This code is often employed in the context of large gatherings of civic or business groups, such as a dinner sponsored by a chamber of commerce.
Black-Tie Formal Wear: What It Actually Means. Black tie is a dress code for social functions that start after 6 p.m., and basically translates to “this party is fancy and men should wear tuxedos.” While the intricacies of black tie formal wear applies more to men than to women, it’s still important to understand that your attire should definitely be appropriate.
Even if the dress code is "casual," there still are guidelines, and they don't include flip-flops, logo T-shirts or yoga pants. Decoding the "casual attire" dress code depends the event and the location. Dressy casual, business casual, smart casual and country club casual call for similar, but sometimes slightly different, styles.
Cocktail attire is usually described as less formal than formal attire, but not too casual. Similar to but usually slightly less formal than semi-formal attire, it typically means a dark suit or slacks and a sport coat for men, and a cocktail dress or nice blouse and skirt for women.
A tuxedo or formal dark suit and tie. She should wear: A long evening dress, dressy suit or formal cocktail-length dress. The invite says "cocktail attire" This is slightly less formal than black tie and black tie optional, which means no tux required for men and no floor-length gown required for women (unless you'd like to wear a long dress).
A "black tie optional" dress code calls for formal attire. While attire may be slightly more casual than a "black tie" affair, some overlap in appropriate dress exists when comparing black tie and black tie optional events. Both men and women have multiple options for black tie optional outfits.
Our men’s fashion accessories include a wide-variety stud sets, dress shirt studs, tuxedo studs and cufflinks. We also carry many engravable gifts and other cool cufflinks for men. Our tuxedo shirt studs, superhero cufflinks or a star wars tie can make excellent last minute groomsmen gifts.
At most companies, however, the "smart casual" dress code is a step up from "business casual," but not as formal as "boardroom attire." It's neat and professional — but still on the more informal side. "The key look in this dress code is a chic, put-together ensemble," Price says.