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Discover Your Perfect Fit with Confidence
Explore Bijoux by ST’s expert guide to finding your ideal ring size.
Accurate Measurement Methods
Follow our step-by-step techniques to ensure your ring size is precise, guaranteeing comfort and style every time.
Helpful Size Conversion Chart
Use our comprehensive ring size chart to find your perfect fit. Includes UK, US and EU size conversions, plus full and half sizes for precise measuring.
Free Resizing
We offer one free ring resizing with every purchase to ensure the perfect fit. If your ring isn’t quite right, just contact us within 30 days and we’ll resize it for free. Please note: the buyer is responsible for return postage costs.
Measuring Guide
Discover how to accurately measure your ring size with Bijoux by ST’s expert guidance to ensure a perfect fit for our exquisite gold pieces.
1
Option One: Measure an existing ring
- Choose a ring that fits the finger you’re buying for.
- Measure the inside diameter (in mm) with a ruler or caliper.
- Match it to the chart below.
2
Option Two: Measure your finger
- Cut a thin strip of paper or use a string.
- Wrap it snugly around the base of your finger.
- Mark where the ends meet.
- Measure the length in millimeters.
- Use the chart below to find your ring size (look under finger circumference).
Ring Size Chart
We understand that finding the perfect fit is essential, which is why we offer half sizes in addition to standard full sizes. Whether you’re between sizes or simply prefer a more tailored fit, our half-size options ensure greater comfort and accuracy when choosing your ring.
| UK Size | US Size | EU Size | Inside Diameter (mm) | Finger Circumference (mm) |
|---|---|---|---|---|
| A | 0.5 | 37.5 | 12.04 | 37.8 |
| A½ | 0.75 | 38 | 12.24 | 38.5 |
| B | 1 | 38.5 | 12.45 | 39.1 |
| B½ | 1.25 | 39 | 12.65 | 39.7 |
| C | 1.5 | 40 | 12.85 | 40.4 |
| C½ | 1.75 | 40.5 | 13.06 | 41.0 |
| D | 2 | 41.5 | 13.26 | 41.7 |
| D½ | 2.25 | 42 | 13.46 | 42.3 |
| E | 2.5 | 42.5 | 13.67 | 43.0 |
| E½ | 2.75 | 43 | 13.87 | 43.6 |
| F | 3 | 44 | 14.07 | 44.2 |
| F½ | 3.25 | 45 | 14.28 | 44.9 |
| G | 3.5 | 45.5 | 14.48 | 45.5 |
| G½ | 3.75 | 46 | 14.68 | 46.1 |
| H | 4 | 46.5 | 14.88 | 46.8 |
| H½ | 4.25 | 47 | 15.09 | 47.4 |
| I | 4.5 | 47.5 | 15.29 | 48.1 |
| I½ | 4.75 | 48 | 15.49 | 48.7 |
| J | 5 | 49 | 15.70 | 49.3 |
| J½ | 5.25 | 49.5 | 15.90 | 50.0 |
| K | 5.5 | 50 | 16.10 | 50.6 |
| K½ | 5.75 | 51 | 16.31 | 51.3 |
| L | 6 | 51.5 | 16.51 | 51.9 |
| L½ | 6.25 | 52 | 16.71 | 52.5 |
| M | 6.5 | 52.5 | 16.92 | 53.2 |
| M½ | 6.75 | 53.5 | 17.12 | 53.8 |
| N | 7 | 54 | 17.32 | 54.4 |
| N½ | 7.25 | 54.5 | 17.53 | 55.1 |
| O | 7.5 | 55 | 17.73 | 55.7 |
| O½ | 7.75 | 56 | 17.93 | 56.4 |
| P | 8 | 56.5 | 18.14 | 57.0 |
| P½ | 8.25 | 57 | 18.34 | 57.6 |
| Q | 8.5 | 57.5 | 18.54 | 58.3 |
| Q½ | 8.75 | 58 | 18.75 | 58.9 |
| R | 9 | 59 | 18.95 | 59.5 |
| R½ | 9.25 | 60 | 19.15 | 60.2 |
| S | 9.5 | 60.25 | 19.35 | 60.8 |
| S½ | 9.75 | 61 | 19.56 | 61.5 |
| T | 10 | 61.5 | 19.76 | 62.1 |
| T½ | 10.25 | 62 | 19.96 | 62.7 |
| U | 10.5 | 62.75 | 20.17 | 63.4 |
| U½ | 10.75 | 63 | 20.37 | 64.0 |
| V | 11 | 64 | 20.57 | 64.6 |
| V½ | 11.25 | 64.5 | 20.78 | 65.3 |
| W | 11.5 | 65.25 | 20.98 | 65.9 |
| W½ | 11.75 | 66 | 21.18 | 66.6 |
| X | 12 | 66.5 | 21.39 | 67.2 |
| X½ | 12.25 | 67 | 21.59 | 67.9 |
| Y | 12.5 | 67.75 | 21.79 | 68.5 |
| Y½ | 12.75 | 68.5 | 22.00 | 69.1 |
| Z | 13 | 68.8 | 22.20 | 69.8 |
| Z½ | 13.25 | 69.5 | 22.40 | 70.4 |
| Z+1 | 13.50 | 71 | 22.60 | 71.0 |
| Z+1½ | 13.75 | 71.5 | 22.80 | 71.6 |
| Z+2 | 14 | 72.5 | 23.00 | 72.3 |
| Z+2½ | 14.25 | 73 | 23.20 | 72.9 |
| Z+3 | 14.50 | 73.5 | 23.40 | 73.5 |
| Z+3½ | 14.75 | 74 | 23.60 | 74.1 |
| Z+4 | 15 | 75 | 23.80 | 74.8 |
| Z+4½ | 15.25 | 75.5 | 24.00 | 75.4 |
| Z+5 | 15.50 | 76 | 24.20 | 76.0 |
| Z+5½ | 15.75 | 76.5 | 24.40 | 76.7 |
Still unsure? No problem—we offer one free ring resizing with every purchase. If your ring doesn’t fit, simply contact us within 30 days for a complimentary resize. Please note: return shipping costs are the buyer’s responsibility.