The Semi-Formal Wedding Dress Code, Decoded

Just how formally are you supposed to dress for a semi-formal wedding? Semi-formal wedding attire is an extremely popular choice as far as dress codes go, but it's also one of the more ambiguous ones since "casual" and "semi-formal" can seem awfully similar. According to The Knot Real Weddings Study, which surveyed nearly 10,000 newlyweds who were married in 2023, 62% of couples opted to have a semi-formal wedding. Why? It's neither too fancy nor too casual, a sweet spot that can take some major sartorial pressure off of guests.

Here's the simplest way to define it: Semi-formal attire falls somewhere between casual attire and formal attire. While you won't need to show up in an evening gown or tuxedo, it's not a situation where anything goes, either. Below, we're outlining exactly what semi-formal wedding guest attire means for men and women, including some of the most common questions about this tricky dress code. We've also solicited expert advice and hand-picked several looks to inspire your choices when you're ready to start shopping.

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In this article:

• What Is Semi-Formal Wedding Attire?
• What to Wear to a Semi-Formal Wedding
• Semi-Formal Attire for Women
• Semi-Formal Attire for Men

What Is Semi-Formal Wedding Attire?

Semi-formal wedding attire is dressier than casual attire but not as dressy as formal attire. Sometimes referred to as "dressy casual," it usually requires some traditionally formal pieces but frees up the ways you can wear them. "It's polished and stylish but not overly dressy," says Risa Kostis, wedding stylist and cofounder of The Rescue Kit Company. For suiting, dress shirts and ties aren't required, nor are matching suit pieces. Yep—that means going the no-jacket route is completely appropriate. You can mix and match suit separates, work a sweater into the outfit (a great option for fall or winter weddings), or leave your tie at home. For those wearing dresses, something shorter or midi-length is perfect, though it's also appropriate to wear jumpsuits and separates.

Kostis notes that the season and time of day may also play a part in how you piece together your semi-formal wedding outfits. "Lighter colors and fabrics are typically seen as more appropriate for daytime events, while you'll find darker tones and different textures at evening celebrations," she says. "You might also see seasonal fabric changes in this style of dress." For example, a tailored linen suit would be ideal for a summer destination wedding, while a snowy locale could call for thicker textured fabrics like flannels and velvets.

What to Wear to a Semi-Formal Wedding

If you're wondering what to wear to a semi-formal wedding, you've come to the right place. Occupying the space between formal and casual, you'll want to toe that line without crossing too far in either direction. With that in mind, here are some of the most common questions about dressing for a semi-formal wedding.

Photos: Nardos, Banana Republic, ASTR The Label, Monique Lhuillier, Cinq à Sept, Bonobos, Sachin & Babi,Design: Ashley Detmering for The Knot

Is semi-formal wedding attire the same as cocktail?

Semi-formal and cocktail dress codes are relatively similar, but they're not the same. You can think of semi-formal wedding attire as a slightly toned-down version of cocktail attire. These two dress codes overlap in the sense that they're both less formal than black-tie attire and allow for more flexibility in color and style. However, cocktail attire leans slightly more formal and structured, usually requiring darker suit colors and dresses that feel more elevated and evening-appropriate. "For semi-formal attire, women can wear short dresses, longer dresses or dressy jumpsuits," says Kostis. "Men may opt for lighter-colored suits (versus tuxedos) for daytime weddings and, in some cases, can get away with linen shorts with polo shirts, collared shirts or even a light sweater."

Can I wear a floor-length dress to a semi-formal wedding?

While formal, black tie and white tie are the only wedding dress codes that require floor-length gowns, Kostis says a longer dress is okay for a semi-formal wedding as long as it's not overly formal and feels right for the occasion. "If the wedding is outdoors during the day or in a casual setting, a tea-length, midi or knee-length dress may feel more in line with the semi-formal dress code," she says. If you do wear a longer dress, opt for something a little more laidback and casual than a full-on gown—think a flowy printed maxi dress for the summer or a polished ankle-length sweater dress for winter.

Can you wear jeans to a semi-formal wedding?

Even though semi-formal is interchangeable with "dressy casual," you shouldn't take the phrase too literally. In general, we don't recommend wearing jeans to a wedding (even the most casual weddings), and especially not for a semi-formal dress code. Opt for dress pants or khakis instead, paired with a blazer or suit jacket and tie.

Kostis says the only exception to this rule is when the couple specifically requests that guests wear jeans. "If it's a ranch wedding and denim is encouraged for either the wedding day or wedding-related events, then it's absolutely acceptable to show up in jeans," she says. "But under normal semi-formal circumstances, however, I always think it's best to err on the side of being a tad more dressy to be safe and honor the occasion in good taste."

What shoes do you wear with semi-formal wedding attire?

According to Kostis, semi-formal footwear should be both elegant and comfortable, and the right choice can vary depending on the outfit, venue and time of day. Semi-formal wedding guest shoes for women can include high heels, like classic pumps, wedges or strappy sandals, though a more refined pair of flats will also work. Oxfords, loafers, derbies and dressy leather sneakers are all good wedding guest shoes for men attending a semi-formal wedding. Avoid casual sneakers (even if they're brand new) and stay away from flip-flops and anything overly chunky.

Ready to shop? Jump to semi-formal outfit ideas just for you: Semi-Formal Attire for Women | Semi-Formal Attire for Men

Semi-Formal Attire for Women

When it comes to semi-formal attire for women, Kostis says the goal is to look polished and pulled-together without going overboard. Avoid anything overly casual like a sundress or sneakers, but don't go with something too formal like a ball gown or anything resembling black-tie attire. Find middle ground with a knee-length, tea-length or midi-length cocktail dress, and remember that dressy jumpsuits and suits for women are also appropriate semi-formal women's outfits. Lean into soft colors and light, airy fabrics like chiffon or crepe for daytime weddings, and stick to richer colors and textures for evenings. Last but not least, use accessories to your advantage. Jewelry can elevate something on the casual side, while sensible block-heel sandals (versus embellished, sky-high stilettos) can tone down a fancier ensemble. Here are some shoppable outfit ideas we love when it comes to female semi-formal wear.

Blue Satin Asymmetrical Midi Dress

Photo: Lulus

When in doubt, a midi-length satin dress can do no wrong . This one comes in multiple stunning colors and has a cool asymmetrical neckline to give it just enough interest. Plus, it's under $100 and guaranteed to become a staple. Psst: Use code THEKNOT20 for 20% off your first purchase.

Size range: XXS–XL

Long-Sleeve Ruffle Floral Mini Dress

Photo: Nordstrom

Whether it be a daytime ceremony or something laidback and outdoors, sometimes a shorter dress is a more appropriate choice for a semi-formal wedding. This floral-print option still feels modest thanks to its high neckline and long sleeves, and it will work for a variety of seasons.

Size range: XS–L

Short-Sleeve Pink Knit Midi Dress

Photo: Reformation

Stretchy knit material gives this spring-worthy dress a relaxed feel, while a baby-pink shade and midi length keep it feeling elevated and fun. Dial up the dressiness with a pair of strappy heels and some bold earrings, or keep things casual with flats instead.

Size range: XS–XL

Sleeveless Floral Textured Midi Dress

Photo: Anthropologie

This Anthropologie favorite comes in a whopping eight shades, ranging from deep burgundy and dark green to bright red and pastel pink. But what really makes it stand out is its cool, textured floral details, which make it feel a little more elevated than your average sleeveless midi dress. In other words, it's the perfect pick for a semi-formal affair.

Size range: XS–XL

Off-the-Shoulder Black Knit Maxi Dress

Photo: ELOQUII

From the off-the-shoulder silhouette to the laidback texture of the fabric, we love this ELOQUII pick for any semi-formal wedding. And thanks to its versatility, it will look just as chic at a fall affair as it will at a spring garden party depending on how you style it.

Size range: 14–28

Vibrant Red Drop-Waist Midi Dress

Photo: Abercrombie & Fitch

With its bold red shade and handy pockets, this flattering drop-waist dress is just begging to make its debut at a semi-formal spring or summer wedding. And if you love it (Spoiler alert: You will.), you'll be pleased to find it also comes in black and a fun polka-dot pattern.

Size range: XXS–XL; Petite and tall sizes available

Lilac Floral Lace Mini Dress

Photo: Tuckernuck

If a short semi-formal dress is what you're after, Tuckernuck has a Palmerston Dress for just about every venue, vibe and season. This lilac lace version is just right for a spring garden party, but you'll also find it in a range of fall and winter-worthy textures, patterns and shades.

Size range: XXS–4XL

Cotton Puff-Sleeve Midi Dress

Photo: J. Crew

Pretty poplin cotton makes this classic black dress just right for a semi-formal affair. And as any good LBD should do, it will work well for a variety of seasons and provides the perfect canvas for all kinds of looks.

Size range: 00–24

Ruffle Square-Neck Midi Dress

Photo: Show Me Your Mumu

A square neckline, ruffle details and a fun (yet appropriate) side slit make this dress party-ready, while the stretch fabric and easy fit keep it comfortable and laidback. It also comes in 12 colors, so there's an option for just about every kind of semi-formal wedding on your agenda.

Size range: XXS–XXL

Classic Black Ponte Mini Dress

Photo: Banana Republic

Banana Republic's Everywhere Ponte Mini Dress is the quintessential LBD. Amp it up with bold accessories and pointed-toe pumps, or keep it pared-down with simple strappy heels and simple jewelry—the options are aplenty.

Size range: XXS–XXL; Tall sizes available

Semi-Formal Attire for Men

Unsure how to dress for a semi-formal wedding as a male guest? According to Kostis, you can never go wrong with a timeless tailored suit—but don't be afraid to have a little fun with it. "Staying within the basic subtleties of a classic suit but playing with texture, fabric and color can be deemed acceptable and welcomed in a relaxed setting," she says. A crisp, long-sleeve white button-down is a great shirt choice, though a polished white tee can work when paired with something elevated enough. For daytime events, a blazer and slacks or a lighter suit are always reliable, but for evening weddings (or if you want to err on the side of caution), we suggest wearing a classic dark suit. Finish your look with a standard necktie—other accessories, like cufflinks, a pocket square, or a vest, are completely optional. Classic retailers such as Brooks Brothers, Men's Wearhouse and J.Crew are your friends when it comes time to put together a men's wedding guest outfit. Shop our examples below for maximum efficiency.

Modern Black Suit

Photo: Men's Wearhouse

According to Kostis, a classic suit is one of the safest and most appropriate choices for a semi-formal wedding. You'll get plenty of wear out of this affordable option, and it'll pair perfectly with a collared knit polo for a laidback, semi-formal setting.

Size range: 36S–60XL; 29/30–54/34

Textured Italian Wool Suit

Photo: Nordstrom

If black isn't your color, or if you want a slightly more casual look, consider a dark blue option instead. Ted Baker London crushed this one, making the perfect suit for semi-formal weddings and beyond. It has a subtle check print while remaining versatile enough to wear again and again.

Size range: 36S–48L

Navy Slim-Fit Blazer

Photo: J.Crew Factory

Those looking to mix suit separates (and channel old-school Ivy style) would do well with a navy blazer with gold buttons. Pair this one from J. Crew with some dressy chinos or grey suit trousers and you'll be looking like a million bucks.

Size range: 34–46

Herringbone Cotton-Linen Suit

Photo: Banana Republic

Linen perfectly straddles the line between formal and casual, offering any number of ways to style your wedding fit. Wear this beige option from Banana Republic with a sharp white tee or crewneck sweater and elevated sneakers or espadrilles.

Size range: 36S–48L; 30/30–40/34

Silk Palm Tree Tie

Photo: Brooks Brothers

Semi-formal dress codes are the point at which you can start getting a little funky with your choice of necktie, especially since the accessory isn't required as a part of the outfit. Start your journey outside of the box with this silk stunner from Brooks Brothers, which would look great with an oxford and suit separates.

Size range: Regular–L/XL

Classic White Oxford Shirt

Photo: Huckberry

A button-down oxford shirt perfectly bridges the gap between casual and formal–in other words, the exact zone you should be aiming for at a semi-formal wedding. The folks at Flint and Tinder have basically perfected the art of shirting and their classic white oxford will look great with just about any suit you pair it with.

Size range: XS–3XL

Wrinkle-Resistant Cotton Dress Pants

Photo: Bonobos

The Weekday Warrior Dress Pants from Bonobos are semi-formal perfection. These are a great addition to a suit separates arsenal, bringing the best out of a trusty blazer or reliable dress shirt.

Size range: 28/28–54/36

Brown Suede Derby Shoes

Photo: Todd Snyder

Kostis says derbies are a classic choice for semi-formal weddings, and this pair is made with beautiful suede and contrast stitching that's sure to look sharp. The best part? They'll look just as good with denim later.

Size range: 8–13

Light Grey Suit

Photo: The Black Tux

Sometimes you just need a great suit that can be styled for a variety of dress codes and mixed and matched with other suiting pieces when the mood strikes. If you're looking for this sort of jack-of-all-trades suit, The Black Tux has your back. This light grey option comes in a classic cut that won't go out of style, it's made from quality fabrics, and you can rent it or buy it depending on your budget.

Size range: 34XS–58XL; 28/26–54/36

Blue and White Striped Dress Shirt

Photo: Charles Tyrwhitt

Charles Tyrwhitt's signature button-down is a versatile piece of semi-formal sartoria. You can style this with a tie, open the collar and wear it on its own, or layer with a sweater or sweater vest. You'll get as much use out of it at weddings as you will during the workweek.

Size range: 14.5/32–20/38; Custom sleeve length available