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
From Blush to Bold: A Guide to Colored Lab Diamonds
Discover the beauty of colored lab-grown diamonds—real, ethical, and affordable. Learn how they’re made, popular colors, and why they’re the sustainable choice for modern fine jewelry.
How to Choose the Perfect Tennis Bracelet
Whether you're investing in your first everyday tennis bracelet or adding to your stack of bracelets, choosing the right one involves more than just picking a pretty sparkle. Here's a complete guide to help you select the perfect tennis bracelet—one that fits your style, lifestyle, and story.
How to Choose the Perfect Diamond Earrings
Diamond earrings are timeless, elegant, and endlessly versatile — whether you're dressing up for a black-tie event or adding sparkle to your everyday look. But with so many options available, how do you choose the perfect pair?