
When buying a new piece, you can trade in old gold and apply its value to the purchase.
Two methods — both take under a minute and need no special tools.
| Size | Diameter (mm) | Circumference (mm) |
|---|---|---|
| 15 | 15.3 | 48 |
| 15.5 | 15.9 | 50 |
| 16 | 16.5 | 52 |
| 16.5 | 17.2 | 54 |
| 17 | 17.8 | 56 |
| 17.5 | 18.2 | 57 |
| 18 | 18.8 | 59 |
| 18.5 | 19.5 | 61 |
| 19 | 19.7 | 62 |
| 19.5 | 20.4 | 64 |
| 20 | 21 | 66 |
| 20.5 | 21.6 | 68 |
| 21 | 22.3 | 70 |