James Allen ring size guide
James Allen uses standard US ring sizing in quarter and half steps. Your US size is your James Allen size; convert to UK, EU or millimetres with the chart below.
Your size is US 7 (UK N½, EU 54).
Fit confidence Exact table match
Measurement confidence 70/100 · Medium Standard chart conversion; final fit still depends on band width and knuckle shape. Confirm with a printable or physical sizer before ordering an expensive ring.
- US
- 7
- UK
- N½
- EU / ISO
- 54
- Japan
- 14
- CH / IT / ES
- 14
- Ø mm
- 17.32
- Circ mm
- 54.4
| US | UK | EU | JP | CH | Ø mm | Circ mm |
|---|---|---|---|---|---|---|
| 3 | F½ | 44 | 4 | 4 | 14.07 | 44.2 |
| 3.5 | G½ | 45 | 5 | 5 | 14.48 | 45.5 |
| 4 | H½ | 47 | 7 | 7 | 14.88 | 46.8 |
| 4.5 | I½ | 48 | 8 | 8 | 15.29 | 48.0 |
| 5 | J½ | 49 | 9 | 9 | 15.70 | 49.3 |
| 5.5 | K½ | 51 | 10 | 11 | 16.10 | 50.6 |
| 6 | L½ | 52 | 12 | 12 | 16.51 | 51.9 |
| 6.5 | M½ | 53 | 13 | 13 | 16.92 | 53.1 |
| 7 | N½ | 54 | 14 | 14 | 17.32 | 54.4 |
| 7.5 | O½ | 56 | 15 | 16 | 17.73 | 55.7 |
| 8 | P½ | 57 | 16 | 17 | 18.14 | 57.0 |
| 8.5 | Q½ | 58 | 17 | 18 | 18.54 | 58.3 |
| 9 | R½ | 60 | 18 | 20 | 18.95 | 59.5 |
| 9.5 | S½ | 61 | 19 | 21 | 19.35 | 60.8 |
| 10 | T½ | 62 | 20 | 22 | 19.76 | 62.1 |
| 10.5 | U½ | 63 | 22 | 23 | 20.17 | 63.4 |
| 11 | V½ | 65 | 23 | 25 | 20.57 | 64.6 |
| 11.5 | W½ | 66 | 24 | 26 | 20.98 | 65.9 |
| 12 | Y | 67 | 25 | 27 | 21.39 | 67.2 |
| 12.5 | Z | 68 | 26 | 28 | 21.79 | 68.5 |
| 13 | Z½ | 70 | 27 | 30 | 22.20 | 69.7 |
How James Allen sizing works
James Allen rings are sized in US numbers (often quarter sizes), with a free first resize on many rings. Measure your US size and order it directly.
James Allen ring size chart
| James Allen (US) | UK | EU | Ø mm |
|---|---|---|---|
| 3 | F½ | 44 | 14.07 |
| 3.5 | G½ | 45 | 14.48 |
| 4 | H½ | 47 | 14.88 |
| 4.5 | I½ | 48 | 15.29 |
| 5 | J½ | 49 | 15.70 |
| 5.5 | K½ | 51 | 16.10 |
| 6 | L½ | 52 | 16.51 |
| 6.5 | M½ | 53 | 16.92 |
| 7 | N½ | 54 | 17.32 |
| 7.5 | O½ | 56 | 17.73 |
| 8 | P½ | 57 | 18.14 |
| 8.5 | Q½ | 58 | 18.54 |
| 9 | R½ | 60 | 18.95 |
| 9.5 | S½ | 61 | 19.35 |
| 10 | T½ | 62 | 19.76 |
| 10.5 | U½ | 63 | 20.17 |
| 11 | V½ | 65 | 20.57 |
| 11.5 | W½ | 66 | 20.98 |
| 12 | Y | 67 | 21.39 |
| 12.5 | Z | 68 | 21.79 |
| 13 | Z½ | 70 | 22.20 |
Frequently asked questions
Does James Allen use US ring sizes?
Yes. James Allen uses US sizing, frequently in quarter-size steps, and offers a free first resizing on many rings.
What is a James Allen size 9 in UK and EU?
A US 9 is UK R½ and EU 60 (19.0 mm diameter, 59.5 mm circumference).
Ringsizely is an independent ring size converter and is not affiliated with, endorsed by, or sponsored by James Allen. Brand names are used for identification only. Always confirm with the retailer before ordering a non-resizable ring.