US Ring Size 12 in mm (Diameter & Circumference)
US ring size 12 = 21.38 mm inner diameter, 67.2 mm circumference (UK X½, EU 67, JP 25)
| US/CA | UK/AU | EU/ISO | JP | Diameter | Circumference |
|---|---|---|---|---|---|
| 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 |
| 13 | Z+1 | 69.5 | 27 | 22.2 mm | 69.7 mm |
FAQ
What is ring size 12 in mm?
About 21.38 mm across the inside, 67.2 mm around.
What is US 12 in UK size?
About X½.
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.