What to Wear to a Cocktail Party: The Cocktail Attire Guide

When the invite says cocktail attire and you are wondering what to wear to a cocktail party, the short answer is dressy but not formal: a knee length dress or a jumpsuit for women, a suit or a blazer and smart trousers for men. It sits in the sweet spot between everyday clothes and black tie, polished and a little elegant, without being over the top.

Cocktail is the most common dress code for evening events, weddings, work parties and celebrations, which is exactly why it causes so much second guessing. Get the few basics right, length, fabric and a dressy finish, and you will look right at home whatever the room turns out to be.

What cocktail attire actually means

Cocktail attire is semi formal. It is dressier than what you would wear to the office or dinner with friends, but less formal than black tie, which calls for a floor length gown or a tuxedo. Think refined, evening appropriate, and made from a fabric with a bit of richness or sheen.

The code gives you real room to express yourself. The point is to look like you made an effort for an occasion, so a dark suit, a little black dress, a jumpsuit or a dressy separates combination all qualify. When in doubt, lean slightly dressier; it is far easier to feel comfortable a touch overdressed than underdressed.

What to wear, for women

You have the widest range here, so pick what makes you feel confident.

The cocktail dress

A knee length or midi dress in a dressy fabric is the classic choice. A little black dress is foolproof, but a jewel tone, a satin slip or a dress with some texture all work beautifully. Avoid anything floor length, which reads black tie.

A jumpsuit

A tailored jumpsuit in a dressy fabric is a modern, comfortable alternative to a dress, and it photographs wonderfully. Finish it with heels and a statement earring and it is every bit as dressed up.

Dressy separates

A silky camisole or an elegant top with tailored trousers or a midi skirt is a chic, flexible option. A blazer over a slip dress is another reliable, slightly edgier take on cocktail.

What to wear, for men

For men, cocktail usually means a suit, with a little more freedom than a formal event allows.

A dark suit, navy, charcoal or black, with a crisp shirt is the safe, sharp default. You can skip the tie at most cocktail events, or add one for a more formal room. If the event is on the relaxed side, a blazer with smart trousers and leather shoes works well, as long as everything is tailored and the shoes are dress shoes rather than trainers.

Keep colors on the refined side and let the fit do the work. A well tailored outfit in a plain dark tone always reads more expensive and more appropriate than a flashy one that does not fit.

Length, fabric and color

Three things separate a cocktail outfit from an everyday one. Length comes first: knee length or midi for dresses, never floor length, which crosses into formal. Fabric comes second: choose something with a little sheen, drape or texture, satin, silk, crepe, velvet or a fine wool, rather than cotton jersey or denim.

Color is the most flexible. Black is always safe and always chic, but jewel tones, deep neutrals and rich prints all suit the occasion. Save very casual pastels and loud novelty prints for other events, and when the party is seasonal or themed, let that steer the shade.

Shoes and accessories

Shoes lift the whole outfit. For women, heels are the classic finish, but a dressy flat, a block heel or an elegant ankle strap all work if you want comfort for a long evening. For men, polished leather dress shoes, oxfords or loafers, complete the look; leave the trainers at home.

Keep accessories deliberate. One statement piece, a bold earring, a clutch, a good watch, does more than piling on several. A small structured bag for women and a pocket square or quality watch for men are the kinds of finishing touches that signal you dressed for the occasion.

What not to wear

A few things undercut a cocktail look. Skip jeans, trainers, shorts, t shirts and anything you would wear to run errands, however nice. Avoid floor length gowns and tuxedos unless the invite says black tie, since being more formal than the room can feel as off as being too casual.

If the event is a wedding, do not wear white or anything close to it, and check whether the couple set a theme or color. When an invite is vague, a quick message to the host about the dress code is always smarter than guessing.

Choosing the outfit online

Cocktail outfits are often bought for a specific date, which makes a wrong fit or an unexpected length genuinely stressful, especially when the event is soon and returns take time. A model photo will not tell you where a midi hem lands on you or how a neckline sits.

A virtual try-on takes the risk out of it. Preview the dress, jumpsuit or outfit on your own photo and you can see the length, the fit and the overall look on your body before you commit, which matters most when there is no time for a second order. Try it with our free virtual try-on, then check the size chart against your measurements.

Frequently asked questions

What does cocktail attire mean?

Cocktail attire is semi formal: dressier than everyday or office wear, but less formal than black tie. For women it means a knee length or midi dress, a jumpsuit or dressy separates; for men, a dark suit or a tailored blazer with smart trousers.

What should a woman wear to a cocktail party?

A knee length or midi dress in a dressy fabric is the classic choice, and a little black dress is foolproof. A tailored jumpsuit or silky separates with heels also work. Avoid floor length gowns, which read as black tie.

Can you wear a long dress to a cocktail party?

It is better to keep dresses knee length or midi for cocktail, since floor length reads formal or black tie. If you love a longer hem, a sleek midi is the safest way to add length while staying within the dress code.

What do men wear to a cocktail party?

A dark suit, navy, charcoal or black, with a crisp shirt, tie optional. At relaxed events a blazer with smart trousers works. Finish with polished leather shoes, and keep everything well tailored and in refined colors.

What colors are best for cocktail attire?

Black is always safe and chic, and jewel tones, deep neutrals and rich prints all suit the occasion. Go easy on very casual pastels and loud novelty prints, and never wear white to a cocktail party that is a wedding.

The bottom line

Dressing for a cocktail party comes down to one idea: dressy but not formal. Women can reach for a knee length dress, a jumpsuit or elegant separates, and men for a dark suit or a sharp blazer and trousers, all in rich fabrics with a polished finish. Keep the length right, the fabric a little luxe, and the accessories deliberate.

Before the event, see how the outfit actually looks and where the hem lands on your body, so there are no surprises on the night. Preview it on your own photo with our free virtual try-on, and explore related ideas like how to style a black dress or wedding guest outfit ideas.

Ready to try it yourself? Upload a photo and see any outfit on you in seconds, and your first try-ons are free. Start a try-on →