Find the size that fits perfectly.The first time.
A ring should feel like it was made for you — because it was. This guide shows you exactly how to measure your finger at home, convert between international sizing standards, and choose with confidence using our complete ring size chart.
A ring you love should be a ring that fits.
Ring size is the one detail that can quietly undo an otherwise perfect piece. Too loose and it spins, slides, and risks slipping off. Too tight and it pinches, marks the skin, and becomes uncomfortable to wear all day.
The good news: finding your correct size is simple, and you can do it accurately at home in under a minute. This page walks you through every method, explains how the international standards relate to one another, and gives you our full conversion chart.
"A well-fitted ring should slide on with a little resistance and need a gentle pull to come off over the knuckle."
Four things that change your reading.
Fingers are smallest in the early morning and in cold weather, and largest in the evening and heat. Measure at the end of the day, at normal body temperature, for the most reliable everyday fit.
If your knuckle is noticeably wider than the base of your finger, size to slide over the knuckle — then choose the nearest size that still sits snugly at the base.
Wide bands fit more snugly than thin ones. For a band wider than about 6mm, consider going up a quarter to a half size for comfort.
Take your measurement two or three times on different occasions and use the average. A single reading can mislead; a consistent one rarely does.
Three ways to find your size.
Choose whichever is easiest with what you have to hand. The string-and-ruler method works for everyone; measuring an existing ring is the most accurate if you already own one that fits.
- 1Cut a thin strip of paper or a length of string about 10cm long.
- 2Wrap it snugly around the base of the finger — not too tight, not loose.
- 3Mark where the end overlaps with a pen.
- 4Lay it flat against a ruler and measure the length in millimetres.
- 5That length is your inner circumference — match it on the chart below.
- 1Take a ring that already fits the intended finger well.
- 2Measure the inner diameter straight across, edge to edge, in millimetres.
- 3Be precise — even half a millimetre changes the size.
- 4Find that inner diameter in the chart below.
- 5Read across for your India, USA, and Europe size.
- 1Visit any local jeweller and ask to be sized on a ring stick.
- 2It is quick, free, and the most precise of all.
- 3Ask for the measurement in millimetres or the India size.
- 4Share that with us and we will confirm the exact fit.
- 5Ideal for a surprise — have their finger sized discreetly.
Enter your measurement, get your size.
Already measured your finger or an existing ring? Enter the value and we will match it to your India, USA, UK, Europe, and Japan ring size instantly — using the same chart shown below.
Choose whether you are entering the inner circumference (the distance around the inside) or the inner diameter (straight across). If your number falls between two sizes, we recommend the larger.
The complete international chart.
Match your inner circumference or inner diameter to find your size in any standard — India, USA & Canada, UK & Australia, Europe, and Japan & China. India sizing is highlighted, as it is the standard we use by default.
| Circumference (mm) | Diameter (mm) | India | USA & Canada | UK / AU / IE | Europe (ISO) | Japan / China |
|---|---|---|---|---|---|---|
| 48 | 15.27 | 8 | 4 1/2 | I | 48 | 8 |
| 49 | 15.70 | 9 | 5 | J 1/2 | 49 | 9 |
| 51 | 16.10 | 11 | 5 1/2 | K 1/2 | 51 | 10 |
| 52 | 16.51 | 12 | 6 | L 1/2 | 52 | 11 |
| 53 | 16.92 | 13 | 6 1/2 | M 1/2 | 53 | 13 |
| 55 | 17.35 | 14 | 7 | N 1/2 | 55 | 14 |
| 56 | 17.75 | 15 | 7 1/2 | O 1/2 | 56 | 15 |
| 57 | 18.19 | 16 | 8 | P 1/2 | 57 | 16 |
| 58 | 18.53 | 17 | 8 1/2 | Q 1/2 | 58 | 17 |
| 59 | 18.89 | 18 | 9 | R 1/2 | 59 | 18 |
| 61 | 19.41 | 19 | 9 1/2 | S 1/2 | 61 | 19 |
| 62 | 19.84 | 20 | 10 | T 1/2 | 62 | 20 |
| 63 | 20.20 | 22 | 10 1/2 | U 1/2 | 63 | 22 |
| 65 | 20.68 | 23 | 11 | V 1/2 | 65 | 23 |
| 66 | 21.08 | 24 | 11 1/2 | W 1/2 | 66 | 24 |
| 68 | 21.49 | 25 | 12 | X 1/2 | 68 | 25 |
| 69 | 21.89 | 26 | 12 1/2 | Z | 69 | 26 |
| 70 | 22.33 | 27 | 13 | Z 1/2 | 70 | 27 |
Small habits that lead to a perfect fit.
Most sizing errors come from a handful of avoidable mistakes. A measurement taken carelessly — cold hands, a stretched string, the wrong finger — can put you a full size off. These pointers keep your reading honest.
If you only remember one thing: measure the actual finger the ring will live on, at the end of a normal day, and do it more than once.
Each finger differs, and the same finger differs between hands. Always size the exact finger the ring is intended for.
Cold shrinks fingers and gives a too-small reading. Measure when your hands are warm and at rest.
A string stretched tight reads smaller than the truth. Wrap it snug but relaxed, the way a ring would actually sit.
A slightly large ring can be resized down easily. Going larger from a too-tight band is more involved — so round up.
Questions about ring sizing.
Sizing can feel fiddly, especially when buying a surprise or shopping across international standards. These are the questions we hear most — with straight answers.
Still unsure? Chat with us on WhatsApp and we will walk you through it — we typically respond within a few minutes.
Chat on WhatsAppFound your size? Find your ring.
Explore our collection of IGI certified lab grown diamond rings — each one made to order, in your exact size. Not sure on fit? Talk to us first; we are happy to help.