Woman wearing the Ariadna Mermaid Halter Maxi Dress featuring a deep plunge halter neckline, open back with adjustable tie fastening, gold-tone hardware at the ruched waist, subtle waist cut-out and a floor-length mermaid silhouette, ideal for weddings, black-tie events and formal evening occasions.
Woman wearing the Ariadna Mermaid Halter Maxi Dress featuring a deep plunge halter neckline, open back with adjustable tie fastening, gold-tone hardware at the ruched waist, subtle waist cut-out and a floor-length mermaid silhouette, ideal for weddings, black-tie events and formal evening occasions.
Woman wearing the Ariadna Mermaid Halter Maxi Dress featuring a deep plunge halter neckline, open back with adjustable tie fastening, gold-tone hardware at the ruched waist, subtle waist cut-out and a floor-length mermaid silhouette, ideal for weddings, black-tie events and formal evening occasions.
Woman wearing the Ariadna Mermaid Halter Maxi Dress featuring a deep plunge halter neckline, open back with adjustable tie fastening, gold-tone hardware at the ruched waist, subtle waist cut-out and a floor-length mermaid silhouette, ideal for weddings, black-tie events and formal evening occasions.
Woman wearing the Ariadna Mermaid Halter Maxi Dress featuring a deep plunge halter neckline, open back with adjustable tie fastening, gold-tone hardware at the ruched waist, subtle waist cut-out and a floor-length mermaid silhouette, ideal for weddings, black-tie events and formal evening occasions.
Woman wearing the Ariadna Mermaid Halter Maxi Dress featuring a deep plunge halter neckline, open back with adjustable tie fastening, gold-tone hardware at the ruched waist, subtle waist cut-out and a floor-length mermaid silhouette, ideal for weddings, black-tie events and formal evening occasions.
Woman wearing the Ariadna Mermaid Halter Maxi Dress featuring a deep plunge halter neckline, open back with adjustable tie fastening, gold-tone hardware at the ruched waist, subtle waist cut-out and a floor-length mermaid silhouette, ideal for weddings, black-tie events and formal evening occasions.
Woman wearing the Ariadna Mermaid Halter Maxi Dress featuring a deep plunge halter neckline, open back with adjustable tie fastening, gold-tone hardware at the ruched waist, subtle waist cut-out and a floor-length mermaid silhouette, ideal for weddings, black-tie events and formal evening occasions.
Woman wearing the Ariadna Mermaid Halter Maxi Dress featuring a deep plunge halter neckline, open back with adjustable tie fastening, gold-tone hardware at the ruched waist, subtle waist cut-out and a floor-length mermaid silhouette, ideal for weddings, black-tie events and formal evening occasions.
Woman wearing the Ariadna Mermaid Halter Maxi Dress featuring a deep plunge halter neckline, open back with adjustable tie fastening, gold-tone hardware at the ruched waist, subtle waist cut-out and a floor-length mermaid silhouette, ideal for weddings, black-tie events and formal evening occasions.
Woman wearing the Ariadna Mermaid Halter Maxi Dress featuring a deep plunge halter neckline, open back with adjustable tie fastening, gold-tone hardware at the ruched waist, subtle waist cut-out and a floor-length mermaid silhouette, ideal for weddings, black-tie events and formal evening occasions.
Woman wearing the Ariadna Mermaid Halter Maxi Dress featuring a deep plunge halter neckline, open back with adjustable tie fastening, gold-tone hardware at the ruched waist, subtle waist cut-out and a floor-length mermaid silhouette, ideal for weddings, black-tie events and formal evening occasions.
Woman wearing the Ariadna Mermaid Halter Maxi Dress featuring a deep plunge halter neckline, open back with adjustable tie fastening, gold-tone hardware at the ruched waist, subtle waist cut-out and a floor-length mermaid silhouette, ideal for weddings, black-tie events and formal evening occasions.
Woman wearing the Ariadna Mermaid Halter Maxi Dress featuring a deep plunge halter neckline, open back with adjustable tie fastening, gold-tone hardware at the ruched waist, subtle waist cut-out and a floor-length mermaid silhouette, ideal for weddings, black-tie events and formal evening occasions.
Woman wearing the Ariadna Mermaid Halter Maxi Dress featuring a deep plunge halter neckline, open back with adjustable tie fastening, gold-tone hardware at the ruched waist, subtle waist cut-out and a floor-length mermaid silhouette, ideal for weddings, black-tie events and formal evening occasions.
Woman wearing the Ariadna Mermaid Halter Maxi Dress featuring a deep plunge halter neckline, open back with adjustable tie fastening, gold-tone hardware at the ruched waist, subtle waist cut-out and a floor-length mermaid silhouette, ideal for weddings, black-tie events and formal evening occasions.

Women's Halter Mermaid Maxi Dress with Open Back for Formal & Evening Wear

£42.95
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Make an unforgettable entrance in the Women's Mermaid Halter Maxi Dress, a striking evening gown designed for weddings, black-tie events, galas and elegant celebrations. Featuring a dramatic halter neckline with a deep plunge front, this floor-length dress beautifully enhances the silhouette while the fully open back creates a sophisticated, modern finish.

A ruched waist is accented with elegant gold-tone hardware and subtle cut-out detailing, adding a refined statement before flowing into a graceful mermaid skirt that skims the figure and flares gently at the hem. Whether you're attending a formal dinner, prom, race day event or cocktail evening, this timeless maxi dress delivers effortless glamour from every angle.

Pair it with metallic heels, a sleek clutch and delicate jewellery for a polished occasion look.

Features

  • Elegant halter tie neckline with deep plunge front
  • Striking open back with adjustable tie fastening
  • Gold-tone hardware detail at the ruched waist
  • Flattering waist cut-out design
  • Figure-enhancing mermaid silhouette
  • Floor-length maxi hem with graceful movement
  • Sleeveless design
  • Perfect for weddings, black-tie events, galas, proms, race days, formal dinners and evening occasions

Material & Care

  • Premium stretch fabric with a smooth, elegant finish
  • Soft, lightweight and comfortable to wear
  • Fully lined where applicable
  • Gentle cold hand wash or professional dry clean
  • Hang to dry and steam before wear if needed

Fit & Sizing

  • True to size
  • Figure-skimming fit through the bodice and hips
  • Mermaid skirt flares gently from the knee
  • Adjustable halter tie for a customised fit
  • If between sizes, we recommend sizing up for the best fit

Estimated delivery time: In total, most orders arrive within approximately 6 to 10 business days from the time you place your order. Please read more about our Shipping Policy here.

If your order does not meet your expectations, you can return it within 30 days upon receipt.

Please read more about our 'Return and Refund Policy' here.

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FREQUENTLY ASKED QUESTIONS?

Yes, we currently offer free shipping on all orders.

For the latest details, please refer to our Shipping Policy or review the information shown at checkout.

We want you to shop with confidence for women’s and men’s fashion at By Hayley. If your order is not quite right, we aim to make the return and refund process as simple and transparent as possible.

30 Day Return Window

You may return eligible items within 30 days of receiving your order.

To qualify for a return, items must meet the following conditions:

  • The item must be unworn, unused, and in its original condition
  • All original tags, labels, and packaging must still be included
  • Any accessories that were included with the item must also be returned

If you need help at any stage, our customer support team is available to assist you.

Read more about our Return and Refund Policy.

Orders are typically processed and dispatched within 1 to 2 business days.

After dispatch, delivery usually takes around 5 to 8 business days. In most cases, orders arrive within approximately 6 to 10 business days from the date the order is placed.

For more detailed delivery information, please see our Shipping Policy.

Most product pages include a size chart or measurements to help you select the correct size.

We recommend that you:

  • review the size guide carefully
  • think about whether you prefer a closer fit or a looser fit

If you’re unsure, feel free to contact us for personalized sizing advice.