Men's formal wear guide covering tuxedo dress codes, lapels, accessories and black tie rules

TL;DR (too long; didn't read):

• Black tie requires a black or midnight navy jacket with satin or grosgrain lapels, a white dress shirt, and a black self-tie bow tie. A long tie is not correct.
• Single breasted tuxedo jackets must have peak lapels and a single button. Double breasted jackets also require peak lapels.
• Tuxedo trousers must be flat front with no belt loops, no turn-ups, and a satin galon stripe along the side seam.
• A cummerbund covers the shirt gap below the jacket button and should be worn with pleats facing upwards.
• Footwear must be sleek and light - black patent Oxford cap toes, opera pumps, or velvet loafers. Derby shoes and monk straps are not appropriate.
• A self-tie bow tie always looks better than a pre-tied one. If a watch is worn, it must be small, simple, and on a leather strap.

Men's formal wear and the difference between black tie and white tie dress codes

Men's formal wear is one of the most specific areas of menswear - and one of the most frequently misunderstood. Most men will encounter a black tie dress code at some point in their lives, whether it's a wedding, a gala, an awards evening, or a formal dinner. And yet, the number of men who show up in the wrong shirt, the wrong tie, or the wrong shoes suggests that the rules are far less widely known than they should be.

So let's start from the beginning. There are two levels of men's formal wear that are still relevant today. White tie sits at the very top - a white bow tie, a white waistcoat, and a long tailcoat. It's an extreme level of formality that almost no one encounters outside of royal ceremonies, state dinners, or very particular high society events. For the vast majority of men, white tie is a theoretical concept rather than a practical reality.

Black tie is the dress code most men will actually need to understand. It means a black or very dark midnight navy jacket - never a standard suit - paired with matching trousers, a white dress shirt, and a black bow tie. Not a long tie. Not a necktie. A black bow tie. This is one of the most common mistakes seen on red carpets, at weddings, and at formal events, and it's one that signals immediately that the wearer doesn't fully understand the dress code.

The tuxedo - known in the UK as a dinner jacket and in much of Europe as a smoking - was designed specifically as evening wear. It was built for artificial light, for late dinners, and for occasions where all the men in the room are expected to look the same. That uniformity is the point. The dark, restrained formality of black tie exists to create a backdrop against which everything else - and everyone else - can shine.

Get the fundamentals right, and everything else becomes a matter of refinement. The sections that follow cover every element of the black tie dress code in detail - from tuxedo jacket lapel styles and tuxedo trousers features to bow tie tying tips, formal wear accessories for men, and the right footwear for evening wear occasions.

The tuxedo has a more interesting origin story than most men realise - and it starts, as so many things in menswear do, in Britain. In the 1880s, a shorter, more relaxed evening jacket was created for the Prince of Wales, who found the long tailcoats of the period uncomfortable and impractical for private dinners. His tailor produced something shorter, cleaner, and considerably more comfortable - still black, still formal, but far less restrictive than what came before.

That shorter jacket made its way to the United States, where it was adopted by a wealthy gentlemen's club in Tuxedo Park, New York. The name stuck. What had started as a more relaxed alternative to white tie formality became, in America, the tuxedo - and it was from there that the garment's reputation was built and its rules were codified.

Here's the detail that most people find surprising: when the tuxedo first appeared, it was considered rebellious. Too casual. Too comfortable. It was a departure from the rigid formality of white tie, and the establishment wasn't entirely sure what to make of it. The idea that men now treat the tuxedo as the pinnacle of formal dressing - something reserved for the most special occasions - is a complete reversal of how it was originally perceived.

The garment was designed specifically for evening wear in artificial light. Gas lighting, specifically. The fabrics, the dark colours, the satin finishes on the lapels - all of it was considered in the context of how the cloth would look under the warm, low light of a formal dining room or ballroom. That's why black and midnight navy remain the correct colours. They were chosen for a reason, and that reason hasn't changed.

It was Hollywood that turned the tuxedo into an icon. From the 1930s through to the 1960s, the golden age of cinema put men in black tie on screen repeatedly - at high society parties, in romantic scenes, at glamorous events. The contrast of white shirt against black jacket, the clean silhouette, the sense of occasion - it lodged itself in the cultural imagination in a way that no amount of fashion commentary could replicate. Men wanted to wear tuxedos because the men they admired on screen wore them and looked extraordinary doing it.

The broader point about evening wear etiquette for men hasn't changed since those early days. The tuxedo exists to create a uniform. When all the men in a room are dressed in black tie, the effect is one of collective elegance rather than individual competition. The women in the room wear colour, texture, and drama. The men provide the backdrop. That's the purpose, and understanding it changes how you think about getting dressed for a formal occasion.

The jacket is where most black tie outfits succeed or fail. Get the construction right and the rest of the outfit has a solid foundation to build on. Get it wrong - wrong lapel, wrong button configuration, wrong pocket style - and the whole thing reads as a suit that's been pressed into service as a tuxedo. That's not a compliment.

Start with the lapels. The finish on a tuxedo jacket lapel is one of its defining features. Traditionally, lapels are covered in a satin or grosgrain finish - a different material to the jacket body, which creates that characteristic contrast between the two surfaces. Satin gives a cleaner, shinier finish. Grosgrain is slightly more textured and toned down. Both are correct. The same finish is carried through to the jet pockets and the buttons, which should also be covered in matching fabric. This consistency is what separates a proper tuxedo from a dressed-up suit.

Now, lapel shape. For a single breasted tuxedo jacket, the lapel must be a peak lapel. A notch lapel - where the gorge line is open - reads as less formal and is not appropriate for black tie. One button, peak lapel, single breasted: that's the correct configuration. For a double breasted jacket, peak lapels are also required. The most common double breasted format is six buttons with one or two to fasten, though four by two also works. Both are fully correct for black tie.

Shawl lapels are a different conversation. They work well on a dinner jacket - particularly a wider, more substantial shawl collar - but on a traditional tuxedo, a very thin shawl lapel can read as too soft, too feminine. If you go shawl, make sure it has enough weight and presence to hold its own against the formality of the rest of the outfit.

Pockets matter more than most men think. A correct tuxedo jacket has jet pockets - clean, flap-free openings with the same covered finish as the lapels and buttons. No flap pockets. No patch pockets. If you see a tuxedo jacket with flap pockets and two buttons, what you're looking at is a suit jacket that has been adapted into tuxedo styling. It's a shortcut taken by manufacturers who don't want to cut a separate tuxedo pattern, and it shows. Avoid it.

One final detail worth knowing: a tuxedo jacket should sit very slightly longer than a standard suit jacket - around a centimetre. It's a subtle difference, but it gives the jacket a more classic, considered silhouette that reads as intentional rather than off-the-rack. Paired with well-draped formal trousers, that extra length makes a visible difference to how the whole outfit carries.

Tuxedo trousers have a very specific set of rules, and they're less forgiving than the rules for the jacket. The jacket allows for some variation in lapel style and button configuration. The trousers do not. They should be as clean, as minimal, and as stripped back as possible - and every detail that deviates from that standard weakens the overall formality of the look.

Flat front. No exceptions. Pleats introduce volume and texture that work against the clean, streamlined silhouette that black tie requires. No belt loops either - a belt has no place on tuxedo trousers, and belt loops draw the eye to the waistband in a way that disrupts the line of the outfit. No turn-ups on the hem. No visible side adjusters. The goal is a trouser that reads as a single, uninterrupted line from waist to shoe.

The one decorative element that belongs on tuxedo trousers is the galon - the satin stripe that runs down the outside seam of each leg. It matches the finish on the jacket lapels and buttons, creating a visual continuity that ties the whole outfit together. It also has a practical benefit: it visually lengthens the leg, which is worth knowing if you're on the shorter side. The galon is not optional. It's part of what makes tuxedo trousers tuxedo trousers rather than plain black trousers.

Braces - or suspenders - are the correct way to hold tuxedo trousers up. They're more comfortable than a belt, they allow a slightly more generous waist fit, and they keep the trouser sitting correctly throughout a long evening. For black tie, the appropriate braces are white with a subtle pattern or sheen - not plain everyday workwear braces, but ones that have been chosen with the formality of the occasion in mind.

The cummerbund exists to solve a specific problem. With a single breasted tuxedo jacket, there's an opening below the button where the white shirt becomes visible against the black trouser waistband. That gap - the triangle of exposed shirt between jacket and trouser - looks unfinished and draws the eye in the wrong direction. The cummerbund covers it cleanly. It wraps around the waist, sits between the jacket hem and the trouser waistband, and completes the unbroken dark line from shoulder to shoe.

One detail that catches people out: the pleats on a cummerbund face upwards, not downwards. It's a small point, but it's the correct way to wear one - and it's noticeable when it's wrong. As for how to wear a cummerbund in terms of fit, it should sit flat and smooth against the shirt without pulling or bunching. It's not a corset. It should look like it belongs there.

The tuxedo shirt is not a standard dress shirt. It has a specific construction, specific details, and specific rules - and substituting a plain white shirt because it looks similar enough is one of the more common black tie mistakes. The visible front of the shirt - the bib - is the part that matters most. Everything else can be made from a different, lighter fabric because it will be hidden under the jacket. But the bib needs to be right.

There are two main bib options. A pleated front - where the fabric is folded into vertical pleats down the chest - is the more festive and traditionally formal choice. It's also more expensive to produce, which is why it's increasingly rare on cheaper tuxedo shirts. A piqué front - a thick, textured weave with a distinctive raised surface - is the more old school option and has a particular character that works very well for traditional black tie dressing. Both are correct. Both look considerably better than a plain white shirt.

French cuffs are not optional on a tuxedo shirt. They're a requirement. And French cuffs mean cufflinks - which is where formal wear accessories for men start to become genuinely interesting. The standard approach is stud buttons on the shirt placket and matching cufflinks at the wrist. Classically these are black with gold or silver settings, but mother of pearl options are particularly striking and work beautifully against a white shirt. The key rule with cufflinks for black tie is restraint. They should reward a close look without shouting from across the room.

A tie bar is not part of black tie dressing - the bow tie sits without one. But the principle of hardware consistency still applies. If your cufflinks are silver, your stud buttons should be silver. If they're gold, stay gold throughout. Mixing metals at this level of formality reads as an oversight rather than a considered choice.

Now, the bow tie. Self-tie, always. A pre-tied bow tie - the kind that clips on or sits perfectly symmetrical straight out of the box - looks exactly like what it is. A self-tied bow tie has a natural, slightly imperfect shape that signals it was tied by hand. That imperfection is the point. It looks more relaxed, more assured, and considerably more elegant than a machine-perfect clip-on. The technique takes practice, but it's worth learning - and there are bow ties available that can be tied once, locked in place, and re-worn without needing to be retied from scratch each time, which makes the process considerably more manageable.

The finish on the bow tie should match the finish on the jacket lapels. Satin lapels pair with a satin bow tie. Grosgrain lapels pair with a grosgrain bow tie. Velvet is also an option, though it produces a thicker knot that reads slightly differently. Whichever finish you choose, the consistency between bow tie and lapel is what holds the whole formal look together at the top half of the outfit.

Footwear is where a lot of black tie outfits quietly fall apart. The jacket is right, the shirt is right, the bow tie is tied by hand - and then the shoes arrive and undercut everything. For men's formal wear, the shoe needs to be light, sleek, and completely without visual weight. You are not walking across a building site. You are not going to the gym. The shoe should look like it was made for standing in a well-lit room and looking correct.

The most traditional option is the opera pump - a low-cut patent leather shoe with a small grosgrain bow at the toe. It's the oldest and most historically correct footwear for black tie, and it still looks extraordinary when worn well. It's also the least common choice among modern men, which means wearing a pair immediately signals a level of knowledge and confidence that most black tie guests won't match.

A black patent leather cap toe Oxford is the most practical and widely accepted option. Mirror-shined, clean-lined, with an elongated toe and a narrow waist - it has the formal edge that black tie demands without requiring the commitment of an opera pump. If you own black Oxfords and they're well-maintained and highly polished, they will serve you well for black tie. The key word is polished. A dull or scuffed Oxford at a formal event is worse than no Oxford at all.

Velvet loafers - Belgian loafers or velvet slippers - are a strong alternative, particularly for dinner jacket occasions or warmer evening events. They're slightly less formal than patent leather Oxfords but more interesting, and the toned-down quality of velvet works well against the formality of a black tie outfit without clashing with it. They're also considerably more comfortable for a long evening.

What you should never wear with black tie: Derby shoes with open lacing, monk straps, or any shoe that reads as daywear regardless of how well it's polished. The lacing system on a Derby shoe - where the eyelet tabs sit on top of the vamp rather than underneath - gives it a casual construction that is fundamentally incompatible with formal evening wear. It's not about the shine. It's about the structure.

Socks should be black silk. Not wool, not cotton - silk. They need to be fine, dark, and unobtrusive. Over-the-calf is the correct length, both for comfort and to ensure no skin is visible when you sit or cross your legs. A flash of bare leg between trouser and sock at a black tie event is the kind of detail that registers immediately to anyone who knows what they're looking at.

The watch question generates more debate than it probably should. Strictly speaking, evening wear etiquette for men suggests no wristwatch at all - a pocket watch being the historically correct alternative. In practice, a very small, very clean dress watch on a leather strap works perfectly well and reads as considered rather than incorrect. The critical word is small. A large sport watch, a steel bracelet, or anything with a busy dial does not belong with men's formal wear. Keep it slim, keep it simple, and keep the strap dark leather. That's the standard, and it's an easy one to meet.

Everything covered in this guide points to the same conclusion: men's formal wear rewards investment. A tuxedo worn once every few years needs to be right when it appears - because the occasions that call for black tie are precisely the occasions where how you look genuinely matters. A poorly fitted tuxedo at a formal dinner or a wedding is far more visible than a poorly fitted suit at the office.

At Westwood Hart, we build custom-tailored tuxedos and dinner jackets to your exact measurements. That means peak lapels positioned correctly for your frame, a jacket length that sits where it should, flat front trousers with a galon stripe that runs cleanly from waist to hem, and a silhouette that was built around you rather than adjusted to fit you after the fact. The difference between a made-to-measure tuxedo and an off-the-rack alternative is visible the moment you walk into a room.

Our online configurator puts every decision in your hands. Fabric, lining, lapel style, button finish - all of it is yours to choose, from wherever you are, without a single appointment. Whether you're after a classic black tuxedo with satin peak lapels, a midnight navy dinner jacket with grosgrain finish, or something with a touch more personality, we have the formal wear options to get it right.

Don't wait for the occasion to find you underprepared. Head over to our online configurator today and start designing a tuxedo that will serve you well for every black tie occasion that follows.

Frequently asked questions about men's formal wear and black tie dress codes

What is the difference between black tie and white tie dress codes?
Black tie requires a black or midnight navy tuxedo jacket with satin or grosgrain lapels, matching trousers, a white dress shirt, and a black bow tie. White tie is a higher level of formality that adds a white bow tie, a white waistcoat, and a long tailcoat. White tie is rarely worn outside of royal ceremonies and state occasions. Black tie is the dress code most men will encounter in practice.

What is the difference between a tuxedo and a dinner jacket?
They refer to the same garment. Tuxedo is the American term, derived from Tuxedo Park in New York where the jacket was first popularised in the United States. Dinner jacket is the British term. Smoking is the European term used in France and parts of continental Europe. All three describe the same black or midnight navy evening jacket worn for black tie occasions.

What lapel style should a tuxedo jacket have?
A single breasted tuxedo jacket must have peak lapels with a single button fastening. A double breasted tuxedo also requires peak lapels. Shawl lapels are more commonly associated with dinner jackets and work better when the shawl collar is wide and substantial rather than narrow. Notch lapels are not appropriate for black tie - the open gorge line reads as insufficiently formal.

Do tuxedo trousers need a stripe down the side?
Yes. The satin galon stripe running down the outside seam of each trouser leg is a defining feature of correct tuxedo trousers. It matches the lapel and button finish on the jacket and creates a visual continuity across the whole outfit. It also visually lengthens the leg. Tuxedo trousers without the galon stripe are simply black trousers.

How do you wear a cummerbund correctly?
A cummerbund wraps around the waist and sits between the jacket hem and the trouser waistband, covering the shirt gap that appears below the jacket button on a single breasted tuxedo. The pleats should always face upwards. It should sit flat and smooth without pulling or bunching. It is not worn with a waistcoat - the two serve the same purpose and should not be combined.

Is a self-tie bow tie better than a pre-tied one?
Yes. A self-tied bow tie has a natural, slightly asymmetrical shape that reads as considered and assured. A pre-tied bow tie looks machine-perfect in a way that immediately signals it was not tied by hand. The slight imperfection of a self-tied bow tie is precisely what makes it look better. The technique takes practice but is worth learning for any man who wears black tie regularly.

What shoes should men wear with a tuxedo?
The most formal option is an opera pump - a low-cut patent leather shoe with a grosgrain bow. A black patent leather cap toe Oxford is the most practical and widely accepted choice. Velvet loafers or Belgian slippers work well for dinner jacket occasions. Derby shoes, monk straps, and any shoe with open lacing are not appropriate for black tie. All footwear should be immaculately clean and polished.

Can you wear a watch with a tuxedo?
Strictly speaking, evening wear etiquette suggests a pocket watch rather than a wristwatch. In practice, a very small and simple dress watch on a dark leather strap is acceptable and reads as considered. Sport watches, steel bracelets, and watches with large or complex dials are not appropriate for men's formal wear. If in doubt, leave the watch off entirely.

When is it appropriate to wear a tuxedo?
A tuxedo is evening wear and is most appropriate for occasions that begin after six in the evening. Black tie weddings, formal dinners, galas, award ceremonies, opera evenings, and private formal events are all appropriate occasions. Wearing a tuxedo to a daytime or outdoor casual wedding is generally considered overdressed. The garment was designed for artificial light and formal indoor settings, and that context should guide when you choose to wear it.