Important notice: As of 20th January 2023, we have updated our Jewellery Size Guide. Please use the guides and instructions below to find the most suitable size for you. Of course, if anyone finds that they fall outside of the size ranges listed, we encourage them to get in touch with us to arrange a custom size.
Measure the circumference of a current ring you own to find what size ring you will need. Alternatively, wrap a piece of string around the base of your finger and measure the length of this to find the circumference. Please refer to our size guide below for the best fit.
| UK SIZE | CIRCUMFRENCE MM | DIAMETER MM | Tomm Jewellery |
|---|---|---|---|
| H | 46.8 | 14.88 | Small |
| I | 48 | 15.25 | |
| J | 48.66 | 15.49 | |
| K | 49.51 | 15.90 | |
| L | 51.23 | 16.31 | |
| M | 52.49 | 16.71 | |
| N | 53.79 | 17.12 | |
| O | 55.07 | 17.53 | Medium |
| P | 56.32 | 17.93 | |
| Q | 57.61 | 18.34 | |
| R | 58.90 | 18.75 | |
| S | 60.16 | 19.15 | |
| T | 61.45 | 19.56 | |
| U | 62.70 | 19.96 | Large |
| V | 64 | 20.37 | |
| W | 65.3 | 20.78 | |
| X | 66.6 | 21.18 | |
| Y | 67.8 | 21.59 | |
| Z | 68.5 | 21.79 |
