Ring Sizing Guide
Accurate sizing is crucial for single-crystal diamond rings — they cannot be resized after creation. Follow this guide to ensure a perfect fit.
Important Notice
Unlike traditional metal rings, single-crystal diamond rings cannot be resized. The entire ring is carved from one piece of diamond — there's no way to add or remove material without destroying the ring. Please ensure accurate sizing before ordering.
How to Measure Your Ring Size
Method 1: Professional Measurement (Recommended)
The most accurate way to determine your ring size is to visit a professional jeweler. They have calibrated ring sizers and can account for factors like:
- Time of day (fingers swell in the afternoon)
- Temperature (fingers shrink in cold weather)
- Knuckle size vs. finger base
- Comfort preferences
Method 2: Using an Existing Ring
If you have a ring that fits the intended finger well:
- Choose a ring that fits the correct finger comfortably
- Measure the inner diameter of the ring in millimeters
- Use the size chart below to find your size
Method 3: String or Paper Method
- Wrap a piece of string or paper strip around your finger
- Mark where it overlaps
- Measure the length in millimeters
- Divide by 3.14 to get the diameter
- Use the size chart below
Note: This method is less accurate. We recommend professional measurement for bespoke orders.
Interactive Tool
Ring Size Calculator
Enter your measurement below to find your ring size in all international formats.
Typical circumference range: 44mm - 70mm
Your Ring Size
This is an estimate. For best results, we recommend professional measurement.
International Size Chart
| US/Canada | UK/Australia | Europe | Japan | Inner Diameter (mm) | Circumference (mm) |
|---|---|---|---|---|---|
| 4 | H | 46.5 | 7 | 14.9 | 46.8 |
| 5 | J | 49 | 9 | 15.7 | 49.3 |
| 6 | L | 51.5 | 12 | 16.5 | 51.9 |
| 7 | N | 54 | 14 | 17.3 | 54.4 |
| 8 | P | 57 | 16 | 18.1 | 57.0 |
| 9 | R | 59 | 18 | 19.0 | 59.5 |
| 10 | T | 62 | 20 | 19.8 | 62.1 |
| 11 | V | 64 | 22 | 20.6 | 64.6 |
| 12 | X | 67 | 24 | 21.4 | 67.2 |
Sizing Tips
Measure at the Right Time
Measure your finger at the end of the day when it's at its largest. Avoid measuring when your hands are cold, hot, or after exercise.
Consider Your Knuckle
If your knuckle is significantly larger than your finger base, choose a size that can pass over the knuckle but won't spin freely.
Measure Multiple Times
Take measurements on different days at different times. The most consistent measurement across multiple readings is likely accurate.
When in Doubt, Size Up
A slightly loose ring is more wearable than a tight one. For between sizes, choose the larger option.
Need Sizing Assistance?
Our team can guide you through the sizing process and help ensure you get the perfect fit.
Contact Us for Help