US Ring Size 10.5 in mm (Diameter & Circumference)
US ring size 10.5 = 20.16 mm inner diameter, 63.3 mm circumference (UK U½, EU 63.5, JP 22)
| US/CA | UK/AU | EU/ISO | JP | Diameter | Circumference |
|---|---|---|---|---|---|
| 9.5 | S½ | 61 | 19 | 19.35 mm | 60.8 mm |
| 10 | T½ | 62 | 20 | 19.76 mm | 62.1 mm |
| 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 |
FAQ
What is ring size 10.5 in mm?
About 20.16 mm across the inside, 63.3 mm around.
What is US 10.5 in UK size?
About U½.
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.