Size guide
Find your size first time.
Just like 98.7% of our customers.
We analysed more than 1,300 customer returns to build a simplified XS to XL sizing system. Fewer sizes, but sizes that actually fit. Find yours in 30 seconds.
Your size in 30 seconds
Pick what you're looking for, we'll do the rest.
How to measure yourself
A tape measure, 2 minutes, in your underwear. Keep the tape level, resting on your skin without pulling tight.
Around the fullest part of your bust, across the nipples.
Just under your bust, around your rib cage. This is the measurement behind the 70, 75, 80 (EU) or 32, 34, 36 (UK/US) of your bras.
Around the narrowest part of your waist, above the navel.
Around the widest part of your hips and bottom, feet together.
Detailed size charts
Every conversion, category by category.
| Band size EU · UK/US · FR |
Cup A | Cup B | Cup C | Cup D |
|---|---|---|---|---|
| 65 · 30 · 80 | XS | XS | XS | * |
| 70 · 32 · 85 | XS | XS | S | S |
| 75 · 34 · 90 | S | S | M | L |
| 80 · 36 · 95 | M | M | L | L |
| 85 · 38 · 100 | L | L | XL | XL |
| 90 · 40 · 105 | XL | XL | XL | XL |
* Your combination isn't listed? Write to us and we'll advise you personally.
| Iris size | EU | UK | US | Waist (cm) | Hips (cm) |
|---|---|---|---|---|---|
| XS | 32 | 6 | 2 | 58 to 70 | 87 to 91 |
| S | 34 | 8 | 4 | 64 to 76 | 91 to 95 |
| M | 36 | 10 | 6 | 70 to 82 | 95 to 99 |
| L | 38 | 12 | 8 | 76 to 88 | 99 to 103 |
| XL | 40 | 14 | 10 | 82 to 94 | 103 to 108 |
| Iris size | EU | UK | US | Bust (cm) | Waist (cm) | Hips (cm) |
|---|---|---|---|---|---|---|
| XS | 32 | 6 | 2 | 79 to 85 | 58 to 64 | 86 to 92 |
| S | 34 | 8 | 4 | 83 to 89 | 62 to 68 | 90 to 96 |
| M | 36 | 10 | 6 | 87 to 93 | 66 to 72 | 94 to 100 |
| L | 38 | 12 | 8 | 91 to 97 | 70 to 76 | 98 to 104 |
| XL | 40-42 | 14-16 | 10-12 | 95 to 101 | 74 to 80 | 102 to 108 |
| Iris size | EU | UK | US | Bust (cm) | Waist (cm) | Hips (cm) |
|---|---|---|---|---|---|---|
| S | 32-34 | 6-8 | 2-4 | 88 to 93 | 68 to 73 | 95 to 100 |
| M | 36-38 | 10-12 | 6-8 | 93 to 98 | 73 to 78 | 100 to 105 |
| L | 40-42 | 14-16 | 10-12 | 98 to 103 | 78 to 83 | 105 to 110 |
| XL | 42-44 | 16-18 | 12-14 | 103 to 108 | 83 to 88 | 110 to 115 |
| XXL | 44-46 | 18-20 | 14-16 | 108 to 113 | 88 to 93 | 115 to 120 |
Why only 5 sizes?
We analysed more than 1,300 customer returns to understand why lingerie never seems to fit. The result: a universal XS to XL sizing system, where each Iris size covers several standard sizes. Our soft lace and carefully designed cuts do the rest. That's why 98.7% of our customers find their size first time, while the industry sees 30 to 50% returns.
The questions you ask us
Answers from our team, straight from your messages.
I'm between two sizes, which one should I pick?
Go for the larger size. Our lace is soft: the size up still fits snugly while being more comfortable. And if it doesn't fit, you can exchange it within 30 days.
I wear an E cup or larger, which size should I choose?
Our charts stop at a D cup, but several of our customers with an E cup are happy with one size up from the one shown for a D cup. The safest option: send us your measurements and we'll reply within 24 hours with a personal recommendation.
How does it fit compared to other brands?
Our sizes follow standard sizing: an Iris M is an EU 36 / UK 10 / US 6 for bottoms, or a 75C, 80A or 80B (UK/US 34C, 36A, 36B) for bras. Use the calculator at the top of the page with your usual size, it does the conversion for you.
What if I still get it wrong?
You have 30 days to exchange your item or get a refund, with a simple return process. Fewer than 1% of our orders lead to a size exchange: the risk is really small.
Still unsure? You're not taking any risk.
Send us your measurements or a photo of the label on your current bra: we'll tell you exactly which size to order.
Ask for advice