EU ring size 59
EU size 59 is equivalent to US size 9, with an inside diameter of approximately 18.9 mm.
Inside diameter18.9 mm
Inside circumference59.5 mm
How to check EU size 59
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 18.9 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.