What is ring size 4 in mm?

US ring size 4 is 14.9 mm inner diameter and 46.8 mm circumference (EU 46.8, UK H½, Japan 7).

Home / Ring size 4 in mm

Ring size 4 in mm

Inner Ø14.9mm

Circumference46.8mm = EU/ISO

UKH½

JP · CN7

IT · ES · CH6.8

US ring size 4 has an inner diameter of 14.9 mm and an inner circumference of 46.8 mm. The EU/ISO size is that circumference (46.8); in the UK it’s H½, in Japan/China 7, and in Italy/Spain/Switzerland 6.8 (circumference minus 40). Not sure of your size? Measure a ring you own with the on-screen ring sizer.