Ring Size Guide
Find Your Perfect Ring Size
NYXNOOR JEWELRY uses US ring sizes by default. Use this guide to measure your finger, compare international sizes, and choose the best fit for your custom fine jewelry.
How to Measure Your Ring Size
Measure an Existing Ring
Choose a ring that fits the same finger you plan to wear your new ring on. Place it flat on a ruler and measure the inside diameter from one inner edge to the other in millimeters.
Measure Your Finger
Wrap a strip of paper or a soft measuring tape around the base of your finger. Mark the overlap, then measure the length in millimeters to find your finger circumference.
International Ring Size Chart
Ring size conversions may vary slightly by jeweler. If you are between two sizes, choose the larger size for comfort, especially for wider bands or stacked ring sets.
| US Size | Inside Diameter (mm) | Circumference (mm) | UK Size | EU Size | HK Size |
|---|---|---|---|---|---|
| 3 | 14.1 | 44.2 | F | 44 | 5 |
| 3.5 | 14.5 | 45.5 | G | 45 | 7 |
| 4 | 14.9 | 46.8 | H | 47 | 9 |
| 4.5 | 15.3 | 48.0 | I | 48 | 10 |
| 5 | 15.7 | 49.3 | J | 49 | 11 |
| 5.5 | 16.1 | 50.6 | K | 50 | 12 |
| 6 | 16.5 | 51.9 | L | 52 | 13 |
| 6.5 | 16.9 | 53.1 | M | 53 | 14 |
| 7 | 17.3 | 54.4 | N | 54 | 15 |
| 7.5 | 17.7 | 55.7 | O | 56 | 16 |
| 8 | 18.1 | 57.0 | P | 57 | 17 |
| 8.5 | 18.5 | 58.3 | Q | 58 | 18 |
| 9 | 18.9 | 59.5 | R | 60 | 19 |
| 9.5 | 19.4 | 60.8 | S | 61 | 20 |
| 10 | 19.8 | 62.1 | T | 62 | 22 |
| 10.5 | 20.2 | 63.4 | U | 63 | 23 |
| 11 | 20.6 | 64.6 | V | 65 | 24 |
| 11.5 | 21.0 | 65.9 | W | 66 | 25 |
| 12 | 21.4 | 67.2 | X | 67 | 26 |
| 13 | 22.2 | 69.7 | Z | 70 | 28 |
| 14 | 23.0 | 72.3 | — | 72 | 30 |
| 15 | 23.8 | 74.8 | — | 75 | 32 |
Helpful Fit Tips
Ring Size Guide FAQ
How do I measure my ring size at home?
You can measure a ring that already fits or wrap a strip of paper around your finger. Measure in millimeters, then compare the result with the chart above.
What is the easiest way to find my ring size?
The easiest method is to measure the inside diameter of a ring that already fits the exact finger you plan to wear your new ring on.
Does NYXNOOR JEWELRY use US ring sizes?
Yes. NYXNOOR JEWELRY uses US ring sizes by default. You can use the international size chart to compare UK, EU, and HK sizes.
What if I am between two sizes?
If you are between two sizes, we recommend choosing the larger size for a more comfortable fit, especially for wider bands or ring sets.
Should I size up for a wide band?
Yes. Wider bands can feel tighter than slim bands, so sizing up slightly can provide a more comfortable fit.
When is the best time to measure my finger?
The best time is at the end of the day. Avoid measuring when your hands are very cold, hot, or swollen.
Tips for Accurate Ring Sizing
For the best results, keep these tips in mind before choosing your ring size.
Best Time to Measure
- Measure your finger at the end of the day, when it is slightly larger.
- Avoid measuring when your hands are cold, as fingers tend to shrink.
- Measure 2–3 times to ensure accuracy.
Comfort & Ring Fit
- If your knuckle is larger than the base of your finger, choose a size that can slide over the knuckle comfortably.
- Wider ring bands may fit tighter, so you may want to consider going half a size larger.
- Even a small difference in measurement can affect the comfort of a ring worn daily.