Ring size
Ring Size Guide
Three ways to find your size
- Measure a ring you already wear. Measure the inside diameter in millimeters and match it to the chart below.
- Measure your finger. Wrap a thin strip of paper around the base of your finger, mark where it overlaps, and measure the length (circumference).
- Ask us. Email hello@stellivon.com for sizing help.
Why size matters for a made-to-order ring
Resizing rule. Because every ring is made for you, we can send it back to our workshop for a size change where the design allows. One size change is free (you cover shipping). A change of up to 2 Hong Kong sizes is possible but requires a new band, charged separately; your centre diamond is reused.
Custom rings are final sale, so please confirm your size carefully before you approve your design. We show every size as both US and Hong Kong (HK) size, because our workshop works in HK sizes.
US and Hong Kong (HK) size chart
| US size | HK size | Inside diameter (mm) | Inside circumference (mm) |
|---|---|---|---|
| 2.75 | 5 | 13.8 | 43.3 |
| 3 | 6 | 14.1 | 44.3 |
| 3.5 | 7 | 14.5 | 45.5 |
| 3.75 | 8 | 14.8 | 46.5 |
| 4.25 | 9 | 15.2 | 47.7 |
| 4.75 | 10 | 15.5 | 48.7 |
| 5.25 | 11 | 15.9 | 49.9 |
| 5.5 | 12 | 16.2 | 50.9 |
| 6 | 13 | 16.6 | 52.1 |
| 6.5 | 14 | 16.9 | 53.1 |
| 7 | 15 | 17.3 | 54.3 |
| 7.5 | 16 | 17.7 | 55.6 |
| 7.75 | 17 | 18.0 | 56.5 |
| 8.25 | 18 | 18.3 | 57.5 |
| 8.75 | 19 | 18.7 | 58.7 |
| 9 | 20 | 19.0 | 59.7 |
| 9.5 | 21 | 19.4 | 60.9 |
| 10 | 22 | 19.7 | 61.9 |
| 10.25 | 23 | 20.1 | 63.1 |
| 10.75 | 24 | 20.4 | 64.1 |
| 11.25 | 25 | 20.8 | 65.3 |
| 11.5 | 26 | 21.1 | 66.3 |
| 12 | 27 | 21.5 | 67.5 |
| 12.5 | 28 | 21.8 | 68.5 |
| 12.75 | 29 | 22.2 | 69.7 |
| 13.25 | 30 | 22.5 | 70.7 |
Source: Chow Sang Sang ring size conversion chart (Ring_Size_Eng.pdf), cross-checked with Wills Jewellery's international ring size conversion table. Conversions are approximate; brands can differ slightly.
Tips
- Measure at the end of the day when fingers are slightly larger, and avoid measuring when cold.
- If you are between sizes, choose the larger one.
- Bands wider than about 4 mm usually need a quarter to half size up.
- Planning a surprise? Borrow a ring from the correct hand to measure. An average guess (US 6–7, HK 13–15) is only safe if the real size is within 2 HK sizes; otherwise a remake is needed.
Ring size