Ring Size Converter
Convert ring sizes between US, UK, EU, JP, diameter and circumference measurements
Size Converter
Select your current size and system
Measurements are rounded to 0.1mm
Converted Sizes
US
-
UK
-
EU
-
JP
-
AU
-
CH
-
DE
-
Diameter
-
Circumference
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Reference Table
Complete size conversion chart
| US | UK | EU | JP | AU | CH | DE | Dia (mm) | Circ (mm) |
|---|---|---|---|---|---|---|---|---|
| 3 | F | 44 | 4 | F | 4 | 14 | 14.1 | 44.2 |
| 3.5 | G | 45 | 5 | G | 5.25 | 14.5 | 14.5 | 45.5 |
| 4 | H | 46.5 | 7 | H | 6.5 | 15 | 14.9 | 46.8 |
| 4.5 | I | 48 | 8 | I | 7.75 | 15.25 | 15.3 | 48 |
| 5 | J 1/2 | 49 | 9 | J 1/2 | 9 | 15.75 | 15.7 | 49.3 |
| 5.5 | L | 50.5 | 10 | L | 10.25 | 16 | 16.1 | 50.6 |
| 6 | M | 52 | 12 | M | 11.5 | 16.5 | 16.5 | 51.9 |
| 6.5 | N | 53 | 13 | N | 12.75 | 17 | 16.9 | 53.1 |
| 7 | O | 54.5 | 14 | O | 14 | 17.25 | 17.3 | 54.4 |
| 7.5 | P | 56 | 15 | P | 15.25 | 17.75 | 17.7 | 55.7 |
| 8 | Q | 57 | 16 | Q | 16.5 | 18 | 18.1 | 57 |
| 8.5 | R | 58.5 | 17 | R | 17.75 | 18.5 | 18.5 | 58.3 |
| 9 | S | 59.5 | 18 | S | 19 | 19 | 19 | 59.5 |
| 9.5 | T | 61 | 19 | T | 20.25 | 19.5 | 19.4 | 60.8 |
| 10 | U | 62 | 20 | U | 21.5 | 20 | 19.8 | 62.1 |
| 10.5 | V | 63.5 | 22 | V | 22.75 | 20.25 | 20.2 | 63.4 |
| 11 | W | 65 | 23 | W | 24 | 20.75 | 20.6 | 64.6 |
| 11.5 | X | 66 | 24 | X | 25.25 | 21 | 21 | 65.9 |
| 12 | Y | 67.5 | 25 | Y | 26.5 | 21.25 | 21.4 | 67.2 |
| 12.5 | Z | 69 | 26 | Z | 27.75 | 21.75 | 21.8 | 68.5 |
| 13 | Z+1 | 70 | 27 | Z+1 | 29 | 22.25 | 22.2 | 69.7 |