Ring Size Calculator
Convert finger measurements to ring sizes across US, UK, and EU systems. Measure your finger circumference in millimeters with a flexible measuring tape or string, then enter it here to find your ring size.
Inputs
Wrap string around finger, mark where it meets, measure in mm
Results
US Size
8.0
UK Size
P
EU Size
57
Diameter
18.1 mm
Ring Size Chart
| US | UK | EU | Circumference | Diameter |
|---|---|---|---|---|
| 4 | H | 47 | 46.8 mm | 14.9 mm |
| 5 | J | 49 | 49.3 mm | 15.7 mm |
| 6 | L | 52 | 51.8 mm | 16.5 mm |
| 7 | N | 54 | 54.4 mm | 17.3 mm |
| 8 | P | 57 | 56.9 mm | 18.1 mm |
| 9 | R | 59 | 59.5 mm | 18.9 mm |
| 10 | T | 62 | 62.1 mm | 19.8 mm |
| 11 | V | 64 | 64.6 mm | 20.6 mm |
| 12 | X | 67 | 67.2 mm | 21.4 mm |
| 13 | Z | 69 | 69.7 mm | 22.2 mm |