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