What Should a Man Wear to a Christmas Dinner at a Restaurant?

Jasper Castelein, OppoSuits

Published September 4, 2026 • 11 min read

Dinner Jacket - Jet Set Black

A restaurant Christmas dinner is its own strange category. It's dressier than a pub quiz with mates, but nobody's expecting a bow tie and cummerbund either. You're stuck guessing what the table next to you will be wearing, and getting it wrong in either direction feels worse than it should.

I get asked about this every December, usually by someone staring at their wardrobe an hour before the booking. The short version: one jacket does the heavy lifting, and everything else stays simple around it.

What follows is how I'd pick between the jackets we make for exactly this kind of night out, depending on the restaurant, the crowd, and how sure you are about the dress code.

• One sequin dinner jacket worn over a plain shirt and dark trousers is enough to read festive at a restaurant, no second patterned or shiny piece needed anywhere else in the outfit.
• The right jacket depends on certainty about the dress code: pick a closer-to-classic style when unsure, and a warmer or bolder shade when the group is already leaning festive.
• Fit matters more at a seated dinner than at a standing party, since a table booking puts an outfit under sustained, close-up view for hours.
• Whether to add a tie comes down to who's at the table, not how shiny the jacket is: casual company skips it, in-laws or work crowds keep it.
• Full costume pieces belong at parties built around fancy dress, not at a restaurant table where the room reads them as out of place.

How dressed up should you get for a restaurant Christmas dinner?

A restaurant Christmas dinner sits above a pub gathering with mates but well below a black tie ball, which puts a jacket over a shirt as the baseline rather than something optional. You don't need a bow tie or a cummerbund, but showing up in just a shirt, or worse, a jumper, leaves you underdressed next to a table that's clearly made an effort.

Sitting through a three-course meal under warm restaurant lighting also means people get a long look at what you're wearing. At a standing party, an outfit gets glanced at across a crowded room. At a table, it's studied for two hours or more, so texture and fit matter more here than they would somewhere loud and dark.

That's also where full costume pieces fall down. A head-to-toe onesie or a novelty print built for carnival or Halloween reads as fancy dress the moment you sit under proper lighting with cutlery in front of you. A restaurant Christmas dinner calls for smart-casual with a festive edge, not a costume, so save those pieces for a party where the whole room is in on the joke.

What's the safest jacket choice if you don't know the restaurant's dress code?

The Dinner Jacket - Jet Set Black is the pick when you genuinely can't work out how strict the restaurant will be. From across the room it reads as a straightforward tuxedo jacket, dark and tailored, so it never looks out of place next to a table in classic black suits.

Get closer and the shine shows itself, enough sparkle to make the night feel like Christmas rather than a Tuesday client dinner. That gap between "looks formal from afar" and "clearly festive up close" is exactly what makes it a safe bet when the invite gives you nothing to go on.

Keep the shirt underneath plain, white or black, with no pattern competing for attention. The jacket is doing the festive work, so the shirt's job is just to stay out of its way.

If the venue turns out stricter than you guessed, you're still fine. Next to a room full of classic black suits, this jacket holds its own rather than sticking out as the one overdressed or underdressed guest at the table.

Dinner Jacket - Black Sequins

Can you wear a sequin blazer to a sit-down dinner without looking too much?

A sequin blazer works fine at a sit-down dinner as long as it's the only shiny thing on you. The Dinner Jacket - Black Sequins and Dinner Jacket - Burgundy both catch restaurant lighting in small flashes rather than pulling attention the way a full printed suit would across a room.

Which one to pick comes down to who's at the table. Burgundy reads warmer and a bit more low-key, so it suits a family dinner or a smaller group where you don't want to be the loudest thing in the room. Black sequins carries a bit more edge and holds up better with a bigger group or a work-adjacent crowd, where you're one of a dozen people getting photographed under restaurant lights.

Either way, the trick is restraint everywhere else. Keep the shirt plain, the trousers a solid dark colour, and the shoes unfussy, so the jacket is the only piece doing any talking. Two shiny or patterned items on the same outfit stops reading as festive and starts reading as fancy dress.

What should you wear underneath the jacket to stay comfortable through a three-course meal?

A fitted shirt, not a tight one, is what keeps you comfortable through a three-course meal at a restaurant. You'll be seated for two hours or more with a napkin on your lap, so anything that pulls across the shoulders or chest gets uncomfortable fast once the starters arrive.

Whether you need a tie underneath comes down to who's at the table. Skip it for a casual dinner with friends or family, since a tie on top of a shine-catching jacket can push the outfit past what the evening actually calls for. Keep it for an in-laws meal or anything work-adjacent, where a bit more formality tends to read better and settles any doubt about how seriously you're taking the night.

For a dinner that's festive without feeling stiff, the Dinner Jacket - Deep Blue pairs easily with an open-collar shirt. Leaving the top button undone works with this jacket in a way it wouldn't with a plain black tux, since the colour already does some of the relaxing for you. It's a small choice, but it's the difference between looking dressed for the occasion and looking dressed for a boardroom.

What colours work best for a Christmas dinner outfit?

Black and deep blue are the two colours that work at almost any restaurant, whatever the crowd or the dress code turns out to be. Burgundy sits a step up in festive energy without tipping into novelty print territory, which makes it a good middle ground between a plain black jacket and a full Christmas costume.

Whichever jacket colour you land on, the same rule from the shirt and trousers above still holds: one colour carries the festive load. Burgundy tends to look richer under a restaurant's low, warm lighting than it does in daylight or under a shop's overhead lights, so it can come across bolder in photos than you'd expect from trying it on at home.

Shirt and trouser pairings for each jacket colour

Which OppoSuits Dinner Jacket fits which Christmas dinner

Which jacket should you actually pack for the night

Go with the Dinner Jacket - Jet Set Black if you're not certain how dressy the restaurant will turn out to be. It reads formal enough to hold its own in a stricter room, and it still has enough shine to feel like Christmas rather than a client dinner.

The one thing that should change your mind is already knowing the group leans festive and photo-heavy. If that's the case, the Burgundy or Black Sequins jacket is the better call, since more shine is the safer bet in that setting, not the risk.

Start by working out which of those two situations you're actually in. Once you know that, the jacket picks itself, and everything else you put on underneath just needs to stay out of its way.

Run through this before you leave the house:

• Pick one jacket to carry the festive element, black sequins, burgundy, deep blue or jet set black
• Keep the shirt and trousers plain so the jacket doesn't compete with another patterned piece
• Skip the tie for a casual dinner with friends, keep it for an in-laws or work-adjacent booking
• Choose burgundy or black sequins if the dinner is a bigger group photo occasion
• Choose Jet Set Black if you're unsure how formal the restaurant's dress code actually is
• Leave full costume pieces like onesies or printed carnival suits for a different kind of party

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