Onyx Maxi Dress
Free shipping
60-day money-back guarantee
10% discount from 2+ items
Details
Square neck front. Lace-up back. The fitted maxi gown that commands every room it enters.
Precise from the front. Striking from behind. The Onyx brings a clean square neckline and wide, structured shoulder straps to the front — a composed, symmetrical frame that holds the look with confident authority. Ruched side detailing along the body sculpts the figure naturally between front and back, gathering fabric inward to enhance the waist and hips without restriction. Behind, an open back with criss-cross lace-up tie detail delivers a high-impact, architectural bare-back reveal that elevates this dress from a standard fitted maxi into something genuinely commanding. A mermaid maxi silhouette follows the body from shoulder to floor with sleek, unbroken precision — making the Onyx the natural choice for black-tie occasions, formal dinners, evening galas, and high-impact formal dressing where the only option is to be completely unforgettable.

Why you'll love it
- A square neckline with wide structured straps creates a clean, symmetrical front frame — a polished geometric neckline that broadens the collarbone and projects confident, composed authority.
- Ruched side detailing gathers fabric along the body to sculpt the waist and define the figure — a flattering construction technique that enhances the silhouette without boning or restriction.
- An open back with criss-cross lace-up tie detail creates a striking architectural bare-back reveal — a bold design statement that makes the back view as powerful as the front.
- A mermaid maxi silhouette follows the body in a long, precise line from shoulder to floor — one of the most elongating and figure-defining cuts in formal evening dressing.
- Built for black-tie galas, formal dinners, award evenings, and high-impact occasion dressing — a gown designed for the moments that call for complete, uncompromising presence.
Shipping + Returns
We offer free shipping on all orders in metropolitan France.
We apply a 60-day return policy, which means you have 60 days after receiving your item to request a return. You can view our Return and Refund Policy here.
Size
Our sizes correspond to standard sizes: simply choose your usual size.
If you are hesitating between two sizes, we recommend choosing the larger size for optimal comfort.
Example: hesitating between S and M? Go for the M.
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Inspiration & Design
Inspired by European film characters, both confident and charming, elegant and unique, our designers aim to recreate these images in fashion. This is how Sebace's unique vision was born, with the goal of crafting clothes that enhance curves, choose trendy colors and patterns, and use fabrics that awaken emotions.
CAREFULLY SELECTED FABRICS
Nous utilisons principalement des tissus naturels comme le coton et le lin écologique, ainsi que des tissus synthétiques d'origine naturelle comme la viscose de qualité et le polyester. Chez Sebace, nos tissus doivent être à la fois flatteurs et confortables.
FREQUENTLY ASKED QUESTIONS
WHAT IS YOUR RETURN POLICY?
We apply a 60-day return policy, which means you have 60 days after receiving your item to request a return.
HOW MUCH DO SHIPPING COSTS?
We offer FREE shipping on all orders! No minimum purchase amount required.
HOW LONG DOES IT TAKE TO RECEIVE MY ORDER?
Our estimated delivery time is 4 to 9 business days from the date of purchase.
WHAT PAYMENT METHODS DO YOU ACCEPT?
We accept the following payment methods:
- All major credit cards (Visa, Mastercard, American Express, Maestro…)
For more details, please refer to our Payment Policy here.
HOW CAN I CONTACT CUSTOMER SERVICE?
You can reach us at:
- Email: info@sheniva.com
- Contact form
We will get back to you within 12 hours, Monday to Friday.
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