US Ring Size 11.5 in mm (Diameter & Circumference)
US ring size 11.5 = 20.98 mm inner diameter, 65.9 mm circumference (UK W½, EU 66, JP 24)
| US/CA | UK/AU | EU/ISO | JP | Diameter | Circumference |
|---|---|---|---|---|---|
| 10.5 | U½ | 63.5 | 22 | 20.16 mm | 63.3 mm |
| 11 | V½ | 64.5 | 23 | 20.57 mm | 64.6 mm |
| 11.5 | W½ | 66 | 24 | 20.98 mm | 65.9 mm |
| 12 | X½ | 67 | 25 | 21.38 mm | 67.2 mm |
| 12.5 | Z | 68.5 | 26 | 21.79 mm | 68.5 mm |
FAQ
What is ring size 11.5 in mm?
About 20.98 mm across the inside, 65.9 mm around.
What is US 11.5 in UK size?
About W½.
Related
Sizes vary by brand and seller. Always check the product's own size chart and measure yourself; this chart is a general standard guide.