Ring Size Converter → Chart → US size 5.5
US Ring Size 5.5
A US/Canada ring size 5.5 converts as follows across every major standard.
UK / AustraliaK½
Europe (ISO)50½
Japan10
Diameter16.1 mm
Diameter0.63 in
Circumference50.6 mm
Not sure size 5.5 is right? Measure your finger or use the converter to check from a measurement.
Size 5.5 in context
| US | UK | EU | Japan | Diameter (mm) |
|---|---|---|---|---|
| 4.5 | I½ | 48 | 8 | 15.3 |
| 5 | J½ | 49 | 9 | 15.7 |
| 5.5 ← | K½ | 50½ | 10 | 16.1 |
| 6 | L½ | 52 | 11 | 16.5 |
| 6.5 | M½ | 53 | 12 | 16.9 |
FAQ
What is a US size 5.5 ring in UK sizes?
A US ring size 5.5 is a UK/Australia size K½. It also equals European size 50½ and Japanese size 10.
What is the diameter of a size 5.5 ring?
A US size 5.5 ring has an inside diameter of 16.1 mm (0.63 inches) and an inside circumference of 50.6 mm.
Is a size 5.5 ring big or small?
Size 5.5 is on the smaller side and common for women.