Sienna | Women's One-Shoulder Twist-Front High-Slit Autumn Wedding Guest Maxi Dress

£86.00 £42.95 Save 50%
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Say hello to the Sienna Women's One-Shoulder Twist-Front High-Slit Autumn Wedding Guest Maxi Dress — your go-to pick for galas, wedding celebrations and any evening that calls for a touch of glamour. With its striking one-shoulder cut, a single flowing long sleeve, a cinched twist at the waist and a leg-baring high slit, this dress delivers a showstopping shape while still keeping you comfortable and free to move all evening long.

Why You'll Love It

  • One-Shoulder Neckline: Highlights the collarbone with a modern, asymmetrical twist.
  • Twist-Front Detail: Nips in at the waist to shape your figure while adding a touch of texture.
  • High Side Slit: Flashes a hint of leg as you walk for a bold, refined finish.

Perfect For

Suited to black-tie weddings, formal dinners, gala nights and award ceremonies — or any special occasion where glamour is the order of the day.

Care Instructions

  • Hand wash in cold water, or pop it in a mesh laundry bag for a gentle machine cycle.
  • Avoid bleach and wringing — allow excess water to drip away naturally.
  • Hang dry away from direct sunlight to preserve the fabric's sheen.
  • Iron on a low setting if needed, keeping the iron clear of any sheer sleeve sections.

Frequently Asked Questions

What sizes are available?
We offer sizes S through 2XL. Between sizes? We recommend sizing up for a more comfortable fit.

How does the one-shoulder sleeve work?
One arm is covered by a flowing, open-style long sleeve, while the other shoulder is left bare for balance.

Is this dress fitted or relaxed?
It sits relaxed but flattering, skimming gently over the waist before falling into a floor-length flow.

What occasions is this dress best suited for?
Perfect for weddings, formal dinners, evening galas and other dressy special occasions.

Size Chart

Size Chest Sleeve Length Waist
S 78.0 cm / 30.7 in 62.0 cm / 24.4 in 137.9 cm / 54.3 in 68.1 cm / 26.8 in
M 80.0 cm / 31.5 in 62.0 cm / 24.4 in 138.9 cm / 54.7 in 70.1 cm / 27.6 in
L 86.1 cm / 33.9 in 63.0 cm / 24.8 in 140.0 cm / 55.1 in 73.9 cm / 29.1 in
XL 89.9 cm / 35.4 in 63.0 cm / 24.8 in 141.0 cm / 55.5 in 78.0 cm / 30.7 in
2XL 91.9 cm / 36.2 in 64.0 cm / 25.2 in 140.0 cm / 55.1 in 78.0 cm / 30.7 in
  • Order Processing Time: 1 to 3 business days (Monday to Friday)
  • Estimated Shipping Time: 5 to 8 business days (Monday to Friday).
  • Free Delivery: Available on all orders within the United Kingdom.

For detailed information, please see our Shipping Policy.

Returns may be requested within 30 days of delivery. For more information, please read our Return and Refund Policy .

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CUSTOMER FEEDBACK

Customer Reviews

4.7
★ ★ ★ ★ ★
Based on 2,945 reviews
5 stars
2,320
4 stars
465
3 stars
120
2 stars
40
1 star
0
C
Claire M. Verified Purchase
August 14, 2026
★ ★ ★ ★ ★

Really pleased with the quality

Ordered a cardigan and blouse together and I'm very pleased with both. The cardigan has a nice weight to it and the blouse fits as expected. Everything arrived neatly packed after about a week.

D
David R. Verified Purchase
August 8, 2026
★ ★ ★ ★ ★

Much better than expected

Bought two polos for work and they've quickly become favourites. The material feels good, the collars keep their shape after washing and the sizing was accurate. I'll probably order another colour.

H
Helen B. Verified Purchase
August 5, 2026
★ ★ ★ ★ ★

Helpful customer service

I put the wrong postcode in by mistake and emailed straight away. They replied the same day and corrected it before dispatch. The jacket arrived a week later and fits beautifully.

M
Mark D. Verified Purchase
July 14, 2026
★ ★ ★ ★ ★

Good overall experience

Ordered two shirts. One fits perfectly and the other is a little more relaxed than expected, but still wearable. Delivery was straightforward and tracking was easy to follow. Good value overall.

M
Martin H.
August 12, 2026
★ ★ ★ ★ ★

Easy from start to finish

First time ordering here and it was all very straightforward. Found the jacket quickly, sizing was clear and checkout was easy. It arrived well packed and fits spot on through the shoulders.

E
Emma J. Verified Purchase
July 18, 2026
★ ★ ★ ★ ★

Looks more expensive than it was

Wore this dress out for dinner and had two people ask where it was from. The fabric falls really nicely and the neckline is neatly finished. It also looks very true to the website photos.

R
Rachel W. Verified Purchase
July 30, 2026
★ ★ ★ ★ ★

Found exactly what I needed

Was looking for something smart but not too dressy and found a blouse very quickly. The site was easy to use and it arrived looking exactly like the photos. Very happy with the fit.

R
Richard S. Verified Purchase
July 21, 2026
★ ★ ★ ★ ★

Simple website and a good jumper

I'm not keen on spending ages shopping online, so I liked how simple the site was. The jumper arrived in about a week, feels soft and fits well. No complaints from me.

L
Louise F. Verified Purchase
July 24, 2026
★ ★ ★ ★ ★

Lovely trousers, slightly generous sizing

These hang really nicely and are very comfortable around the waist. The fabric doesn't cling and still looks smart enough for work. I'd probably size down next time, but otherwise they're lovely.

J
James C. Verified Purchase
July 27, 2026
★ ★ ★ ★ ★

Spot-on fit straight away

Ordered a navy shirt and lightweight jacket and both fitted properly straight away. I'm just over 6ft and the sleeve length was perfect. Tracking updated normally and the quality is very good.

A
Andrew P.
August 2, 2026
★ ★ ★ ★ ★

Good jacket for the money

Really decent casual jacket and pretty much what I wanted. The fabric feels good and the zip seems sturdy. Sleeves are a touch longer than I'd normally wear, but I'm still very pleased with it.

S
Sarah T. Verified Purchase
August 10, 2026
★ ★ ★ ★ ★

Lovely dress, slightly slow delivery

The dress is beautiful and the colour looks just like the photos. Fit is flattering without being too tight. Delivery took around nine days, a little longer than hoped, but I'm very happy with it.

ABOUT ELLISON BOUTIQUE

ABOUT ELLISON BOUTIQUE

At Ellison Boutique, we choose clothing for the moments that make up real British life — from ordinary weekdays to evenings out and everything in between. Our collections for men and women combine effortless style with everyday wearability, so getting dressed simply feels right.

DO YOU HAVE ANY QUESTIONS?

Yes, you can return your order within 30 days of delivery.

Please use the size guide available on the product page before ordering. If you’re between sizes, we recommend choosing the larger size for a more comfortable fit. And if you’re still unsure or would like a little extra help, our customer support team will be happy to assist you.

Yes, we offer free premium shipping because we value you as our customer and want to give you the best possible service.

Yes. Payments are securely processed using trusted payment providers.

Once your order has been dispatched, we’ll email you your tracking information. You can also use our Track Your Order page to follow your delivery.

Free Shipping within the UK
We're providing free shipping on all orders within the United Kingdom. For more information check our Shipping Policy .
30 Days return period
You can return the products within 30 Days after delivery. For more information check our Return and Refund Policy .
Customer Support
Need help? We're here for you! Our team is available from 9:00 AM to 5:00 PM (GMT/BST), Monday to Friday. You can find the contact form here .