Black Belted Square-Neck One-Piece Swimsuit Women UK | S–XL
Black Belted Square-Neck One-Piece Swimsuit
Elegant, flattering and beautifully structured — the Black Belted Square-Neck One-Piece Swimsuit combines a sleek black in high-stretch 82% polyamide / 18% elastane with a polished square neckline, a waist tie belt that cinches for a flattering silhouette, contrast trim detailing and padded cups. Sizes S–XL. Browse our one-piece swimsuits collection.
Why You'll Love It
- Square neckline — a polished, on-trend square collar that flatters the collarbone and decolletage beautifully.
- Waist tie belt — an adjustable belt that cinches the waist for a defined, flattering silhouette.
- Contrast trim — a striking trim detail that adds a dynamic, eye-catching edge to the clean black base.
- Padded cups — built-in padded cups for shape and support. Wire-free.
- High waist — a flattering high-waist fit for confident coverage.
- 82% polyamide / 18% elastane — high stretch, quick-dry, chlorine-resistant.
- Sizes S–XL (UK 8–22).
Fabric & Care
- 82% Polyamide + 18% Elastane. High stretch. Rinse after swimming. Hand wash cold or machine wash on gentle. Dry flat. Do not tumble dry or bleach.
How to Style It
The square neckline and belted waist give this an elevated quality — wear with a simple wide-brim hat and mules for a chic poolside look. Layer a sheer beach cover-up for beach-to-bar ease. For swimwear styling, Vogue UK and Who What Wear UK. Browse our one-piece swimsuits.
Frequently Asked Questions
▶ Does the belt come separately?
No — the belt is part of the swimsuit, attached at the waist. It ties in a bow or knot at the front for a customisable, cinched fit.
▶ Is the square neckline supportive?
Yes — the padded cups and shoulder straps provide support. The square neckline gives a secure, covered fit across the bust.
▶ Can I swim in this?
Yes — the polyamide-elastane blend is designed for water use. Quick-dry and chlorine-resistant.
▶ Are the cups removable?
Refer to product images for cup construction detail. The cups are padded and wire-free for comfort.
▶ How does it size?
High stretch. Size by bust. See the garment chart below. S fits US 4–6, M fits US 8–10, L fits US 12–14, XL fits US 16.
Size Guide — Garment Measurements (INCH)
| SIZE CHART — INCH (high stretch) | ||||||||
| Size | US | Bust | Waist | Shoulder | Length | Strap | Hip | Leg Opening |
| S | 4–6 | 29.1 | 24.8 | 1.6 | 24.7 | 12.4 | 29.9 | 21.7 |
| M | 8–10 | 30.7 | 26.4 | 1.6 | 25.2 | 12.8 | 31.5 | 22.4 |
| L | 12–14 | 33.1 | 28.7 | 1.6 | 26.1 | 13.2 | 33.9 | 24.0 |
| XL | 16 | 35.4 | 31.1 | 1.6 | 26.9 | 13.6 | 36.2 | 25.4 |
Size Guide — Garment Measurements (CM)
| SIZE CHART — CM (high stretch) | ||||||||
| Size | US | Bust | Waist | Shoulder | Length | Strap | Hip | Leg Opening |
| S | 4–6 | 74 | 63 | 4 | 62.7 | 31.5 | 76 | 55 |
| M | 8–10 | 78 | 67 | 4 | 64 | 32.5 | 80 | 57 |
| L | 12–14 | 84 | 73 | 4 | 66.2 | 33.5 | 86 | 61 |
| XL | 16 | 90 | 79 | 4 | 68.4 | 34.5 | 92 | 64.6 |
Specifications
| PRODUCT SPECIFICATIONS | |||
| Material | 82% Polyamide + 18% Elastane | Neckline | Square Collar |
| Colour | Black | Waist | High Waist + Belt |
| Detail | Contrast Trim + Knot/Bow | Padding | Padded Cups (Wire-Free) |
| Stretch | High | Sizes | S, M, L, XL (UK 8–22) |
- Material: 82%Polyamide+18%Elastane
- Machine wash 30°C · Do not tumble dry · Iron on low heat
- Model wears UK size 8 · Height 170 cm
- Standard UK (2–5 days) — free over £75, otherwise £3.99
- Express UK (1–2 days) — £5.99
- International — calculated at checkout
- 30-day easy returns · unworn with tags attached
All measurements in CM. When between sizes, size up.
| UK | EU | US | Bust | Waist | Hips |
|---|---|---|---|---|---|
| 6 | 34 | 2 | 80–83 | 61–64 | 87–90 |
| 8 / S | 36 | 4 | 84–87 | 65–68 | 91–94 |
| 10 / M | 38 | 6 | 88–91 | 69–72 | 95–98 |
| 12 / L | 40 | 8 | 92–95 | 73–76 | 99–102 |
| 14 / XL | 42 | 10 | 96–99 | 77–80 | 103–106 |
| 16 | 44 | 12 | 100–103 | 81–84 | 107–110 |
All measurements in CM. Measure over underwear. When between sizes, size up.
Belted One-Piece Swimsuit Women UK
Fashion that fits your life, not the other way around
Every piece we curate is chosen for how it feels on real women — the cut, the fabric, the confidence it gives you the moment you put it on. Trend-led without being trend-driven.
