Buyer tool
Ring size guide and converter
Sizing errors are the most common reason a wholesale ring order comes back. Measure the finger, not an old ring, and convert before the size run is confirmed.
Convert a size
How to measure at home
- Wrap a strip of paper around the base of the finger, snug but able to slide off over the knuckle.
- Mark the join point and measure the strip in millimetres — that is the inner circumference.
- Compare it with the table. If you land between two sizes, choose the larger for wide bands.
Fingers change with temperature and time of day. Measure in the evening, when the finger is at its largest.
Conversion table
| US | Inner dia. (mm) | Circumference (mm) | UK | EU |
|---|---|---|---|---|
| 3 | 14.1 | 44.2 | F | 44 |
| 3.5 | 14.5 | 45.5 | G | 45 |
| 4 | 14.9 | 46.8 | H | 47 |
| 4.5 | 15.3 | 48.0 | I | 48 |
| 5 | 15.7 | 49.3 | J | 49 |
| 5.5 | 16.1 | 50.6 | K | 50 |
| 6 | 16.5 | 51.9 | L | 51 |
| 6.5 | 16.9 | 53.1 | M | 52 |
| 7 | 17.3 | 54.4 | N | 54 |
| 7.5 | 17.7 | 55.7 | O | 55 |
| 8 | 18.1 | 57.0 | P | 57 |
| 8.5 | 18.5 | 58.3 | Q | 58 |
| 9 | 18.9 | 59.5 | R | 59 |
| 9.5 | 19.4 | 60.8 | S | 60 |
| 10 | 19.8 | 62.1 | T | 61 |
| 10.5 | 20.2 | 63.4 | U | 63 |
| 11 | 20.6 | 64.6 | V | 64 |
| 11.5 | 21.0 | 65.9 | W | 66 |
| 12 | 21.4 | 67.2 | X | 67 |
| 12.5 | 21.8 | 68.5 | Y | 68 |
| 13 | 22.2 | 69.7 | Z | 70 |
Sizing for wholesale orders
A production run is priced by the size curve as much as by the piece count. Thirty rings spread across six sizes need more casting trees than thirty rings in one size, and the per-unit price reflects it.
What to send with the order
- The full size breakdown, in US sizes unless you specify otherwise
- Whether the bands are wide (6 mm+) — wide bands run tight and should be sized up half a size
- Any market-specific convention, such as UK letters or EU circumference
Resizing after delivery
Plain silver and gold bands can often be resized locally. Full-eternity and pavé bands cannot be resized without cutting the setting pattern, so those must be sized correctly at production.
Sizing questions
What if my measurement is between two sizes?
Choose the larger size for wide bands and the smaller for narrow ones. A ring that is slightly loose is easier to wear than one that will not clear the knuckle.
Do you produce half sizes?
Yes, in quarter-size steps on most styles. Half sizes are standard in production; quarter sizes are quoted with the order.
Can a full-eternity band be resized?
Not without cutting the setting. Order the correct size at production, because resizing a full-eternity band breaks the pattern.