Choose a ring that fits the same finger you plan to wear your new ring on.
Measure the inside diameter of the ring in millimetres, making sure you measure only the open space inside the ring, not the metal. Then use our Ring Size Guide (click to open PDF). to find your matching ring size. If the ring falls between two sizes, order the larger size.
Wrap a thin strip of paper or string around the base of your finger.
Mark where the ends meet, then lay it flat and measure the length in millimetres. This gives you your finger circumference. Use the size chart below to find your closest ring size. If the ring falls between two sizes, order the larger size.
| Australia, New Zealand, UK & Ireland | Inside Diameter (mm) | European Size, Inside Circumference (mm) |
| F | 14.07 | 44.2 |
| F½ | 14.27 | 44.8 |
| G | 14.48 | 45.5 |
| G½ | 14.68 | 46.1 |
| H | 14.88 | 46.8 |
| H½ | 15.09 | 47.4 |
| I | 15.29 | 48 |
| J | 15.49 | 48.7 |
| J½ | 15.7 | 49.3 |
| K | 15.9 | 50 |
| K½ | 16.1 | 50.6 |
| L | 16.31 | 51.2 |
| L½ | 16.51 | 51.9 |
| M | 16.71 | 52.5 |
| M½ | 16.92 | 53.1 |
| N | 17.12 | 53.8 |
| N½ | 17.32 | 54.4 |
| O | 17.53 | 55.1 |
| O½ | 17.73 | 55.7 |
| P | 17.93 | 56.3 |
| P½ | 18.14 | 57 |
| Q | 18.34 | 57.6 |
| Q½ | 18.54 | 58.3 |
| R | 18.75 | 58.9 |
| R½ | 18.95 | 59.5 |
| S | 19.15 | 60.2 |
| S½ | 19.35 | 60.8 |
| T | 19.56 | 61.4 |
| T½ | 19.76 | 62.1 |
| U | 19.96 | 62.7 |
| U½ | 20.17 | 63.4 |
| V | 20.37 | 64 |
| V½ | 20.57 | 64.6 |
Humm available online for orders upto $5,000. To place orders for products over $5,000, visit one of our stores.
Energetic design: This signet ring becomes a powerful statement by virtue of the flat, brilliantly polished onyx centre stone. Among other things, the high-quality genuine stone is said to strengthen self-confidence. Finest engraving lines and the unique tendril ornamentation of the acanthus style, interpreted by THOMAS SABO, refine this extraordinary piece of jewellery down to the last detail.
Thomas Sabo Ring Onyx Black TR2242 - Size 58
4 payments of $82.25
