Ring Size Converter → Chart → US size 4.5
US Ring Size 4.5
A US/Canada ring size 4.5 converts as follows across every major standard.
UK / AustraliaI½
Europe (ISO)48
Japan8
Diameter15.3 mm
Diameter0.60 in
Circumference48.0 mm
Not sure size 4.5 is right? Measure your finger or use the converter to check from a measurement.
Size 4.5 in context
| US | UK | EU | Japan | Diameter (mm) |
|---|---|---|---|---|
| 3.5 | G | 45½ | 5 | 14.5 |
| 4 | H½ | 47 | 7 | 14.9 |
| 4.5 ← | I½ | 48 | 8 | 15.3 |
| 5 | J½ | 49 | 9 | 15.7 |
| 5.5 | K½ | 50½ | 10 | 16.1 |
FAQ
What is a US size 4.5 ring in UK sizes?
A US ring size 4.5 is a UK/Australia size I½. It also equals European size 48 and Japanese size 8.
What is the diameter of a size 4.5 ring?
A US size 4.5 ring has an inside diameter of 15.3 mm (0.60 inches) and an inside circumference of 48.0 mm.
Is a size 4.5 ring big or small?
Size 4.5 is on the smaller side and common for women.