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Ring size 4 in mm and international sizes
A US/Canadian size 4 ring is 14.9 mm across the inside and 46.8 mm around. This is on the smaller side of adult sizes and common for little fingers, slim fingers and midi rings.
- US / Canada
- 4
- UK / Australia
- H½
- EU / ISO
- 47
- Japan / China
- 7
- India
- 6
- Italy / Spain / CH
- 7
- Inside diameter
- 14.9 mm
- Circumference
- 46.8 mm
- Diameter (in)
- 0.586″
Size 4 and its neighbours
| US | UK | EU | Japan | Diameter | Circumference |
|---|---|---|---|---|---|
| 3½ | G½ | 45 | 5 | 14.47 mm | 45.5 mm |
| 3¾ | H | 46 | 6 | 14.68 mm | 46.1 mm |
| 4 | H½ | 47 | 7 | 14.88 mm | 46.8 mm |
| 4¼ | I | 47 | 8 | 15.08 mm | 47.4 mm |
| 4½ | I½ | 48 | 8 | 15.29 mm | 48.0 mm |
Check it's really your size
A strip of paper wrapped around your finger should measure 45–48 mm for a size 4. If you're buying a band 6 mm or wider, consider size 4½ instead. Not sure? Try the ring size calculator or the online sizer.
Questions people ask
What is ring size 4 in mm?
A US size 4 ring has an inside diameter of 14.9 mm (0.586 in) and an inside circumference of 46.8 mm.
What is a US 4 in UK and European sizes?
US 4 is UK/Australian H½ and EU (ISO) 47. In Italy, Spain and Switzerland it is 7.
What is a US 4 in Japanese sizes?
The nearest Japanese and Chinese size is 7.
How do I know if I'm a size 4?
Wrap a paper strip around your finger: if it measures about 47 mm, you're a 4. Or measure a ring that fits: about 14.9 mm across the inside.