Exact ring size conversion

EU ring size 64

EU size 64 is equivalent to US size 11, with an inside diameter of approximately 20.6 mm.

Inside diameter20.6 mm
Inside circumference64.6 mm

How to check EU size 64

Measure the inside diameter of a ring that already fits the intended finger. Measure straight across the widest inside point—do not include the metal. Compare that measurement with 20.6 mm.

This is a jewellery-size conversion, not a guarantee of fit. Finger size changes with temperature and time of day; wide bands often need extra room.

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