Ring Sizing Chart & Guide
How to measure your ring size
-
Measure the inside diameter of your existing rings (the distance across the center of the ring) with a ruler and check it against our ring sizing chart
- Order a ring sizer from us and follow this video guide to learn how to measure your ring size.
Tips for Accurate Measurement
- Measure at the end of the day when your fingers are at their largest, or measure multiple times a day just to be sure.
- Avoid measuring when your hands are too cold or too warm, as temperatures can affect finger size.
- Ensure the ring is snug but comfortable—it should slide over your knuckle without being too loose.
International Ring Sizing Conversion Chart
Note: We use US sizing on our product listings, but you can always send us your ring size on another metric system and we can convert it for you.
| Circumference (mm) | Diameter (mm) | Europe | United States/ Canada | UK / Australia | Singapore / Japan | Hong Kong |
|---|---|---|---|---|---|---|
| 44.2 | 14.1 | 44 | 3 | F½ | 4 | 6 |
| 44.8 | 14.3 | 45 | 3½ | G | 5 | |
| 45.5 | 14.5 | 4 | G½ | 7.5 | ||
| 46.1 | 14.7 | 46 | H | 6 | ||
| 46.8 | 14.9 | 47 | H½ | 7 | 9 | |
| 47.4 | 15.1 | I | ||||
| 48.0 | 15.3 | 48 | 4½ | I½ | 8 | 10 |
| 48.7 | 15.5 | 49 | 5 | J | ||
| 50.0 | 15.9 | 50 | 5½ | K | 8 | 10 |
| 51.2 | 16.3 | 51 | L | |||
| 51.9 | 16.5 | 52 | 6 | L½ | 11 | 13 |
| 52.5 | 16.7 | M | 12 | |||
| 53.1 | 16.9 | 53 | 6½ | M½ | 13 | 14.5 |
| 53.8 | 17.1 | N | ||||
| 54.4 | 17.3 | 54 | 7 | N½ | 14 | 16 |
| 55.1 | 17.5 | 55 | O | |||
| 55.7 | 17.7 | 7½ | O½ | 15 | 17 | |
| 56.3 | 17.9 | 56 | P | |||
| 57.0 | 18.1 | 57 | 8 | P½ | 16 | |
| 57.2 | 18.2 | 18 | ||||
| 57.6 | 18.3 | Q | ||||
| 58.3 | 18.5 | 58 | 8½ | Q½ | 17 | 19 |
| 58.9 | 18.8 | 59 | R | |||
| 59.5 | 19.0 | 9 | R½ | 18 | 20½ | |
| 60.2 | 19.2 | 60 | S | |||
| 60.8 | 19.4 | 61 | 9½ | S½ | 19 | 22 |
| 61.4 | 19.6 | T | ||||
| 62.1 | 19.8 | 62 | 10 | T½ | 20 | 23 |
Learn More About Diamonds
15 Iconic Celebrity Diamond Rings
From Zendaya to Selena Gomez, explore 15 iconic celebrity engagement rings — the cuts, carats, and stories behind them, and how to get the look.
How to Choose a Cushion Cut Diamond for Your Engagement Ring
There is a reason the cushion cut has outlasted nearly every trend in fine jewellery. It has been catching candlelight since the 1700s, and it still looks just as at home on a hand today. Soft, rounded corners. A pillowed silhouette. A warmth that a round brilliant or a princess cut simply doesn't have.
Join us at Hitcheed Wedding Wonderland on 18-19 July 2026
Join us at Wedding Wonderland on 18-19 July. Whether you're planning a wedding, treating yourself, or simply love beautiful things, we'll be there with a wide selection of our pieces — from tennis bracelets to eternity rings — for you to see and try in person, along with special pricing available exclusively for the event.