You got the invitation and it says “black tie” — or maybe “cocktail attire” or “semi-formal.” What does that actually mean? Here’s a straightforward guide so you don’t show up over- or under-dressed.

Black Tie
What it means: The most formal dress code you’ll encounter outside of “white tie” (which is extremely rare). Think galas, formal weddings, charity balls.
What to wear:
- Black or midnight blue tuxedo with satin or grosgrain lapels
- White dress shirt (wing collar or turndown)
- Black bow tie (not a long tie)
- Black patent leather shoes
- Optional: cummerbund or vest
The rule: When in doubt at a black tie event, go classic. You can’t go wrong with a traditional black tuxedo.
Cocktail Attire
What it means: A step below black tie. Common for evening weddings, holiday parties, and upscale restaurant events.
What to wear:
- Dark suit (charcoal, navy, or black) — not necessarily a tuxedo
- Dress shirt (white or light blue)
- Tie (a long tie is fine here — silk, patterned, or textured)
- Dress shoes (oxford or loafer)
- Pocket square adds a nice touch
The rule: You want to look polished but not overdressed. A well-fitted dark suit is your best friend.

Semi-Formal
What it means: The most confusing dress code. It’s basically “dress nicely but don’t go full tuxedo.” Common for daytime weddings, business events, and nice dinners.
What to wear:
- Suit in any dark or neutral color (grey, navy, tan for daytime)
- Dress shirt (more color flexibility here)
- Tie optional depending on the event
- Dress shoes or clean leather boots
The rule: Match the time of day. Darker colors for evening, lighter colors for daytime.
Still Not Sure?
Bring the invitation to Diamond Formal Wear and we’ll help you figure out exactly what to wear. We’ve been dressing men for every kind of event for over 20 years — we know what works.
Diamond Formal Wear — 74 Court St, Plymouth, MA — (508) 747-4316