EU ring size 61.5
EU size 61.5 is equivalent to US size 10, with an inside diameter of approximately 19.8 mm.
Inside diameter19.8 mm
Inside circumference62.1 mm
How to check EU size 61.5
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 19.8 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.