What is ring size 6 in mm?

US ring size 6 is 16.5 mm inner diameter and 51.9 mm circumference (EU 51.9, UK L½, Japan 12).

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Ring size 6 in mm

Inner Ø16.5mm

Circumference51.9mm = EU/ISO

UKL½

JP · CN12

IT · ES · CH11.9

US ring size 6 has an inner diameter of 16.5 mm and an inner circumference of 51.9 mm. The EU/ISO size is that circumference (51.9); in the UK it’s L½, in Japan/China 12, and in Italy/Spain/Switzerland 11.9 (circumference minus 40). Not sure of your size? Measure a ring you own with the on-screen ring sizer.