Size & Fit Guide
Not sure which size to pick? Here's how our sizing works across lingerie, nightwear, pyjamas, swimwear and sports bras. All measurements are body measurements in centimetres and inches — measure yourself over your usual underwear for the most accurate fit, and if you're between two sizes, we generally recommend sizing up for comfort.
Lingerie, Nightwear & Loungewear (S–XXL)
| Size | UK Dress Size | Bust | Waist | Hip |
|---|---|---|---|---|
| S | 8–10 | 81–85 cm / 31.9–33.5" | 61–66 cm / 24.0–26.0" | 89–93 cm / 35.0–36.6" |
| M | 10–12 | 85–89 cm / 33.5–35.0" | 66–71 cm / 26.0–28.0" | 93–96.5 cm / 36.6–38.0" |
| L | 12–14 | 89–93 cm / 35.0–36.6" | 71–76 cm / 28.0–29.9" | 96.5–101.5 cm / 38.0–40.0" |
| XL | 14–16 | 93–97 cm / 36.6–38.2" | 76–81 cm / 29.9–31.9" | 101.5–106.5 cm / 40.0–41.9" |
| XXL | 16–18 | 97–102 cm / 38.2–40.2" | 81–86 cm / 31.9–33.9" | 106.5–112 cm / 41.9–44.1" |
Plus size styles in 3XL and 4XL are sized on their own chart, shown on each product page, and cover roughly UK 16 to 24. Browse them in plus size lingerie and plus size nightwear.
Swimwear (UK Numeric Sizing)
| UK Size | Bust | Waist | Hip |
|---|---|---|---|
| 6 (XS) | 77 cm / 30.3" | 56 cm / 22.0" | 85 cm / 33.5" |
| 8 (S) | 81 cm / 31.9" | 61 cm / 24.0" | 89 cm / 35.0" |
| 10 (M) | 85 cm / 33.5" | 66 cm / 26.0" | 93 cm / 36.6" |
| 12 (L) | 89 cm / 35.0" | 71 cm / 28.0" | 96.5 cm / 38.0" |
| 14 (XL) | 93 cm / 36.6" | 76 cm / 29.9" | 101.5 cm / 40.0" |
| 16 (XXL) | 97 cm / 38.2" | 81 cm / 31.9" | 106.5 cm / 41.9" |
Sports Bras & Bralettes
Our seamless and wirefree styles are designed for light-to-medium support and generally run true to size — order your usual S–XXL. If you sit between a band size and a cup size in traditional bra sizing, we'd recommend sizing up for the most comfortable fit, since these styles rely on stretch rather than underwire. Our bra size guide explains how to measure yourself.
Multipacks (Briefs & Tights)
Multipack items (for example, our 3-pack and 6-pack briefs) follow the same S–XXL chart above — the pack number refers to how many pairs are included, not a different sizing system.
Fabric & Fit Notes
Lace and mesh styles have some stretch but are less forgiving than our satin and jersey pieces — if you're between sizes in a lace bodysuit or babydoll, size up for comfort. Satin and fleece pyjama sets are cut for a relaxed, easy fit and are true to size.
These measurements follow standard UK high-street sizing conventions and are intended as a guide. As with any UK retailer, exact fit can vary slightly by style, cut and fabric — when in doubt, size up or get in touch below.
Sizing FAQs
How do I find my UK lingerie size?
Measure your bust at the fullest point, your waist at the narrowest point and your hips at the widest point, then match the measurements to the chart above. If your measurements fall in two sizes, choose the size that matches your bust for babydolls and chemises, and your hips for bodysuits and briefs.
Should I size up or down in lingerie?
Size up if you are between sizes, especially in lace and mesh, which stretch less than satin. Satin nightwear and pyjamas are cut loose, so your usual size is normally right.
What UK size is XXL?
On our main chart XXL is a UK 16 to 18, with a bust of 97 to 102 cm and hips of 106.5 to 112 cm.
Do you sell plus size lingerie?
Yes. Many styles come in XXL, and our dedicated plus size babydolls and sets go up to 4XL, roughly UK 16 to 24. Each product page shows its own size range.
Can I exchange a size?
Yes. Unworn items with their tags can be returned or exchanged within 28 days. For hygiene reasons some items, such as briefs and thongs, can only be returned if faulty.
Still unsure?
Email us at support@lavenandivory.co.uk with the item you're looking at and your usual measurements, and we'll help you pick a size before you order.