Find your ring size
Our sizes are the inside width of the ring in millimetres — a size 17 ring is 17 mm across the inside. Titanium is too hard to resize later, so it's worth two minutes to get it right.
Have a ring that fits? Measure it on screen
The most accurate way. Works on any phone, tablet or laptop — you only need a bank card or a €1 coin to set up your screen.
Hold a bank card against the screen
Place any bank, loyalty or ID card on the outline and drag the slider until the outline is exactly the width of the card.
No ring to hand? Use a strip of paper
- Cut a thin strip of paper, about 1 cm wide and 10 cm long. A piece of string works too, but it stretches.
- Wrap it around the base of the finger you'll wear the ring on. Snug, not tight — it should still slide over your knuckle.
- Mark where it overlaps with a pen, then lay it flat and measure from the end to the mark with a ruler.
- Type that length into the calculator.
Size chart
Already know your size in another system? Find it here. Dutch jewelers use the same millimetre sizes we do.
| Our sizeinside width | Around the fingercircumference | US / Canada |
|---|---|---|
| 15 | 47.1 mm | 4¼ |
| 15.5 | 48.7 mm | 4¾ |
| 16 | 50.3 mm | 5¼ |
| 16.5 | 51.8 mm | 6 |
| 17 | 53.4 mm | 6½ |
| 17.5 | 55.0 mm | 7¼ |
| 18 | 56.5 mm | 7¾ |
| 18.5 | 58.1 mm | 8½ |
| 19 | 59.7 mm | 9 |
| 19.5 | 61.3 mm | 9¾ |
| 20 | 62.8 mm | 10¼ |
| 20.5 | 64.4 mm | 11 |
| 21 | 66.0 mm | 11½ |
Getting it right
- Between two sizes?
- Choose the larger one. A ring can be a touch loose; it can't be forced over a knuckle.
- Measure at the end of the day
- Fingers are smallest when cold and first thing in the morning. Measure when you're warm and have been up for a while.
- Big knuckles
- If your knuckle is much wider than the base of your finger, measure both and pick a size between the two.
- Open rings don't bend
- Some of our designs are open at the back. Titanium is far harder than silver or gold, so please don't try to squeeze or widen them — choose the right size instead.
- Buying a gift?
- Borrow a ring they wear on the right finger and measure it on screen above. If the size turns out wrong, you can exchange it.