RING SIZE GUIDE
Lustre uses US sizing as standard across all fixed-size rings.
How to Find Your Ring Size
Option 1 — Measure an existing ring Take a ring that fits the finger you want to wear your new piece on. Measure the internal diameter in millimetres and match it to the table above.
Option 2 — Measure your finger Wrap a thin strip of paper or a piece of string around your finger. Mark where it overlaps and measure the length in millimetres — this is your circumference. Match it to the table above.
A few tips:
- Fingers are slightly larger at the end of the day and in warm weather — measure then for the most accurate fit
- If you're between sizes, size up
- Measure the specific finger you plan to wear the ring on — finger sizes vary.
- For wide band rings, we recommend sizing up as wider bands fit more snugly than narrow ones.
Adjustable Rings
Many Lustre rings are open-band and fully adjustable, fitting approximately US 6 to US 10. These are marked as "Adjustable" on the product page and do not require sizing.
Still Not Sure?
Email us at sales@shoplustre.com or WhatsApp us at +65 9366 9755 and we'll help you find the right fit.
Size Conversion Table
| US | UK | EU | Japan | Circumference (mm) | Diameter (mm) |
|---|---|---|---|---|---|
| 4 | H | 46.5 | 7 | 46.5 | 14.8 |
| 4.5 | I | 47.8 | 8 | 47.8 | 15.2 |
| 5 | J½ | 49 | 9 | 49.0 | 15.6 |
| 5.5 | K½ | 50.5 | 10 | 50.5 | 16.1 |
| 6 | L½ | 51.9 | 12 | 51.9 | 16.5 |
| 6.5 | M½ | 53.1 | 13 | 53.1 | 16.9 |
| 7 | N½ | 54.4 | 14 | 54.4 | 17.3 |
| 7.5 | O½ | 55.7 | 15 | 55.7 | 17.8 |
| 8 | P½ | 57 | 16 | 57.0 | 18.2 |
| 8.5 | Q½ | 58.3 | 17 | 58.3 | 18.6 |
| 9 | R½ | 59.5 | 18 | 59.5 | 18.9 |
| 9.5 | S½ | 60.8 | 19 | 60.8 | 19.4 |
| 10 | T½ | 62 | 20 | 62.0 | 19.8 |