I’ll be honest in saying that wedding season has always felt a little bittersweet. Don’t get me wrong, there is something undeniably joyful about watching two people celebrate their love on a warm summer afternoon, surrounded by flowers, champagne and questionable dance-floor decisions. But for much of my adult life, the excitement of receiving a wedding invitation was quickly followed by the same familiar sense of dread—what on earth was I going to wear?
As someone who spent most of her life being a UK size 24, occasion dressing always felt more like an exercise in having to make do, as opposed to being able to express myself the way I really wanted to. In my early and mid-twenties, I attended countless weddings wearing the same charity shop-bought beige linen suit, simply because there weren’t many other options available to me. Not because of a lack of style, but because occasionwear options in my size were so limited that constant repetition felt like the safest choice.
Over the past five years, things have shifted. I’m now a UK 16/18, and while the fashion industry still has a long way to go, there’s been a noticeable (if uneven) move towards greater size inclusivity, finally giving me more room to play and experiment with different styles.
My experience across both sides of the sizing spectrum is why I feel so rooted in mid and plus-size dressing—it’s a lived experience. I’ve had to make things work when fashion didn’t make space for bodies like mine, and I know exactly what it feels like when it finally does.
Now, with wedding invitations piling up and more options than ever before, I’ve rounded up a selection of the best wedding guest pieces for mid and plus size bodies —styles that prove occasionwear can be both fashion-forward and genuinely inclusive. Keep scrolling to see the pieces that make my (high) standards below.
Shop the Best Mid-Size and Plus-Size Wedding Guest Dresses 2026
This dress combines a striking scarlet hue with a timeless silhouette that feels both sophisticated and celebratory. The open back detail adds just the right amount of drama, making it a standout dress. I’d wear this with a pair of statement floral heels that command just as much attention.
The Bianca dress is the kind of piece that feels effortlessly elegant, with its fluid silk fabrication, sophisticated high neckline and striking open-back detail, creating the perfect balance between timeless and contemporary. I’d team this with a golden envelope-clutch bag and matching kitten heels for a showstopping wedding.
The buttery, yellow floral print teamed with the exquisite draped cape makes this ARRANGE piece a knockout dress that’ll have everyone talking. Perfect for an evening wedding when teamed with a pair of chunky, velvet platform heels.
I love the clean, sculptural lines and waist detail that this dress provides, creating an elevated silhouette that feels both modern and timeless. It’s minimal, meaning you can afford to pair it with a pair of killer heels.
Although Stine Goya typically goes up to a size 18, in my experience I’ve found that their largest size (especially the oversized pieces) can fit up to a UK22, precisely why I decided to include this gorgeous oversized dress. The short puffed sleeves add a touch of playfulness to this outfit, especially when worn with a huge pair of golden hooped earrings and a slicked back hairstyle.
The sculptural draping and fluid structure of the Cascadia dress exaggerate curves (in the very best way) while creating an effortlessly cinched, elongated silhouette. I would wear this with a pair of flat, golden sandals to a coastal/nautical-themed ceremony.
The Sophie dress makes the perfect wedding guest outfit as it feels festive and elegant, with a soft drape, statement back and versatile scarf detail that makes it look special without trying too hard. Ideal for a destination wedding, I’d pair this with a pair of metallic mules for sunny nuptials.
The Petula dress is a stunning choice due to the soft, floaty silhouette that feels effortlessly elegant, yet sexy. The refined detailing and adding neck scarf strikes the sweet spot between polished and relaxed, so you can look 'put-together' without feeling overdone. I’d wear this to a Registry Office ceremony paired with a pair of boots
The flowing fabric and soft draping of the Skyler dress create an elegant structure that moves beautifully throughout the day. The soft green hue feels refined without being overpowering, and would be ideal for a countryside wedding with a pair of silver heels.
Meshki dresses are known for being slightly oversized, so from experience, I would say their largest sizes could fit up to a UK size 20. You cannot go wrong with a LBD, and this sleek, sexy dress ticks all the boxes.
The cinched waist and flowing maxi cut create an elongating structure that works beautifully on all body shapes, while the floral-stripe print feels seasonal and celebratory while still being polished enough for a formal dress code. I’d team this dress with a pair of strappy sandals and borrow a men's blazer at the end of the night.
The Simara ombre dress has a soft gradient effect that adds an instant visual drama while still feeling refined. The floaty structure moves beautifully and keeps things comfortable from ceremony through to late-night dancing. Team with a pair of gold strappy heels for disco energy.
Pleats are simply made for weddings, and the Georgette dress from Marina Rinaldi fits the bill perfectly in a romantic, dusty pink hue. The flared fit and caped sleeves give it a classy polish without looking overdone. Team with a statement mule.
The chiffon in this piece gives it a light, elegant feel that works beautifully for celebrations, alongside the vintage-inspired pattern that effortlessly transiitons from day to night. A gorgeous high summer wedding guest dress.
Selkie is known for its super size-inclusive, whimsical pieces, so if you’re looking for something dramatic, romantic and slightly out-of-the-box, Selkie is the way to go. The dreamy, playful and romantic style of the Seaside Cure dress is sure to be a conversation starter. Team with a pair of chunky metallic heels.
This is the perfect dress for attending a Mediterranean wedding by the beach given the statement silhouette, loose fit and comfortable wear. It comes with an attached belt in case you want to switch up the style, so all you need is a rattan clutch bag and a pair of heeled mules to finish the look.
The lace detail on this dress is super romantic, while the embellishment adds just enough sparkle for the occasion. This is how to create just enough drama without being overbearing.
The satin overlay and floral embroidery give this dress a soft and feminine feel while the pink hue keeps it romantic and occasion-appropriate. A standout piece with no accessories needed!
The asymmetric ruffle shape adds movement and drama to this otherwise whimsical shape, while the butter yellow colour works to compliment all skin tones. I’d wear this with gold or silver strappy heels.
This dopamine-inspired piece with the added pleats makes this dress dramatic in a demure way. The batwing sleeves and cinched waist makes for a structured silhouette, and can be paired with a pair of nude mules.