Find Your Fit
Discover your ideal fit or find the perfect gift with our comprehensive size guide. It’s time to find out exactly what suits you best.

Ring Size Guide
Size US | Diameter (mm) | Size France |
---|---|---|
3 | 14.1 / 44.2 | 44 |
3 1/2 | 14.5 / 45.5 | 45.5 |
4 | 14.9 / 46.8 | 47 |
4 1/2 | 15.3 / 48.0 | 48 |
5 | 15.7 / 49.3 | 49.5 |
5 1/2 | 16.1 / 50.6 | 50.5 |
6 | 16.5 / 51.9 | 52 |
6 1/2 | 16.9 / 53.1 | 53 |
7 | 17.3 / 54.4 | 54.5 |
7 1/2 | 17.7 / 55.7 | 56 |
8 | 18.1 / 57 | 57 |
8 1/2 | 18.5 / 58.3 | 58.5 |
9 | 18.9 / 59.5 | 59.5 |
10 | 19.8 / 62.1 | 62.5 |
Follow These Steps
Method 1 - Measure Your Finger
- Start by taking a tape measure, a piece of string, or a strip of paper.
- Wrap it around your intended finger, marking the spot where it meets. If planning a ring stack, think about the stack’s placement on your finger.
- Measure the marked length on a flat surface with a ruler, then compare it to the provided size chart to find your matching ring size.

Method 2 - Measure Your Ring
- Select a ring that fits you comfortably.
- Measure the inside diameter of this ring in millimeters.
- Refer to the provided sizing chart to find the nearest match to your ring’s diameter .

Use Our Ring Sizer
How to Use the Ring Sizer On my Mobile
1
Scan QR Code using your mobile phone
2
Use your credit card as a size reference
3
Follow the instructions to find your ring size
MAKE IT SPECIAL
Complementary Kooheji's Jewellery signature gift wrapping for a special gift.
CUSTOM ENGRAVING
Add a personal touch to your piece with our customized engraving service.
FREE RETURNS & EXCHANGE
Enjoy an easy return and exchange process on all your orders.