Home / Ring size chart / Size 11
Ring size 11 in mm and international sizes
A US/Canadian size 11 ring is 20.6 mm across the inside and 64.6 mm around. Larger sizes are stocked less often; check that a design is offered this large before falling for it.
- US / Canada
- 11
- UK / Australia
- V½
- EU / ISO
- 65
- Japan / China
- 23
- India
- 25
- Italy / Spain / CH
- 25
- Inside diameter
- 20.6 mm
- Circumference
- 64.6 mm
- Diameter (in)
- 0.810″
Size 11 and its neighbours
| US | UK | EU | Japan | Diameter | Circumference |
|---|---|---|---|---|---|
| 10½ | U½ | 63 | 22 | 20.16 mm | 63.3 mm |
| 10¾ | V | 64 | 23 | 20.37 mm | 64.0 mm |
| 11 | V½ | 65 | 23 | 20.57 mm | 64.6 mm |
| 11¼ | W | 65 | 24 | 20.77 mm | 65.3 mm |
| 11½ | W½ | 66 | 24 | 20.98 mm | 65.9 mm |
Check it's really your size
A strip of paper wrapped around your finger should measure 63–66 mm for a size 11. If you're buying a band 6 mm or wider, consider size 11½ instead. Not sure? Try the ring size calculator or the online sizer.
Questions people ask
What is ring size 11 in mm?
A US size 11 ring has an inside diameter of 20.6 mm (0.810 in) and an inside circumference of 64.6 mm.
What is a US 11 in UK and European sizes?
US 11 is UK/Australian V½ and EU (ISO) 65. In Italy, Spain and Switzerland it is 25.
What is a US 11 in Japanese sizes?
The nearest Japanese and Chinese size is 23.
How do I know if I'm a size 11?
Wrap a paper strip around your finger: if it measures about 65 mm, you're a 11. Or measure a ring that fits: about 20.6 mm across the inside.