What does black tie optional mean?

Black tie optional means the event is formal, but you don't have to wear a floor-length gown. A gown, an elegant midi in a luxe fabric or a dressy jumpsuit all work, as long as the outfit looks planned for the evening. It's the one dress code that hands the choice back to you, so choose the version of yourself you want to remember from that night.

Updated November 2, 2026

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Black tie optional pieces in the shops right now

Theia, Hayden Satin Midi: Pacifica blue satin with a cowl neck and a pleated skirt below the knee: the formal midi this dress code was made for.
Few Moda, Amaris Velvet Midi: Emerald silk velvet with short sleeves, warm enough for a winter evening and dressy enough for a ballroom.
Amanda Uprichard, Lyra Midi Dress: Berry satin with a soft sheen, thin straps and a leg slit: a midi that reads evening, not office.
Lavish Alice, Quinn Velvet Jumpsuit: Black velvet with long sleeves and wide legs: as formal as a gown, and easier to dance in.
Club L London, High End Velvet Midi: Port velvet with a draped asymmetric neck, to mid-calf: a deep color for a fall or winter wedding.
Theia, Zenobia Satin Gown: Blue duchess satin on one shoulder, in a column to the floor, for when you'd rather go all the way to black tie.
Sachin & Babi, Tyra Floral Dress: Forest green florals to the floor with long sleeves and an empire waist: a softer long look for a winter wedding.
Camilla and Marc, Odessa Satin Dress: Black satin with a draped neckline and an asymmetric hem that falls longer at the back.
Few Moda, Balsam Gown: Black, long and simple, with a deep V and a low back. Let the jewelry do the rest.

Shop all black tie optional dresses

The rules

The short answer

Anything from a formal midi to a floor-length gown, in a fabric that looks like evening. A dressy jumpsuit counts too. What doesn't work: daywear fabrics, a casual sundress, or anything you'd wear to the office.

How long the dress should be

Midi or floor-length is the safe range. A knee-length cocktail dress is the lower edge: fine in satin, velvet or beading, risky in anything plainer. If the event is in the evening and you're unsure, go longer.

Fabrics that read formal

Satin, silk, crepe, velvet, taffeta, and beading or sequins in small doses. Skip cotton, linen, jersey and anything with a casual print.

Colors at a wedding

Jewel tones, deep reds, navy and black all work, and black is especially at home at an evening wedding. Never white, ivory, cream or pale champagne, and nothing that could look bridal in photos. If the couple shared a color palette, check it first.

Black tie optional vs. black tie vs. cocktail

Black tie asks for a floor-length gown. Cocktail asks for a dressy knee-length or midi dress. Black tie optional sits between them: either is right, so pick by the venue, the time of day and how dressed up you want to feel.

Shoes, bag and layers

Heels or dressy flats in satin, metallic or suede, a small clutch, and a wrap or coat that looks as formal as the dress. Skip sneakers, chunky sandals and a work tote.

How to search for one

Name the event, the season and the length you want. "Formal midi in velvet for a black tie optional wedding in January, sleeves, under $250" gets you somewhere. "Black tie optional dress" gets you everything.

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