US Ring Size 6.5 in mm (Diameter & Circumference)
US ring size 6.5 = 16.91 mm inner diameter, 53.1 mm circumference (UK M½, EU 53, JP 13)
| US/CA | UK/AU | EU/ISO | JP | Diameter | Circumference |
|---|---|---|---|---|---|
| 5.5 | K½ | 50.5 | 10 | 16.1 mm | 50.6 mm |
| 6 | L½ | 52 | 12 | 16.51 mm | 51.9 mm |
| 6.5 | M½ | 53 | 13 | 16.91 mm | 53.1 mm |
| 7 | N½ | 54.5 | 14 | 17.32 mm | 54.4 mm |
| 7.5 | O½ | 55.5 | 15 | 17.73 mm | 55.7 mm |
FAQ
What is ring size 6.5 in mm?
About 16.91 mm across the inside, 53.1 mm around.
What is US 6.5 in UK size?
About M½.
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.