Conversion Chart (US, UK, EU Sizes)

Inner Diameter (mm)

US Size

EU/FR Size

Japan

14,01

3

44

4

14,33

3 1/4

45

5

14,65

3 3/4

46

6

14,97

4

47

7

15,29

4 1/2

48

8

15,61

4 3/4

49

9

15,92

5 1/4

50

10

16,24

5 3/4

51

11

16,56

6

52

12

16,88

6 1/4

53

13

17,20

6 3/4

54

14

17,52

7 1/4

55

15

17,83

7 1/2

56

16

18,15

8

57

17

18,47

8 1/4

58

18

18,79

8 3/4

59

19

19,11

9

60

20

 

How to measure your ring size:

Using a measuring tape

  • Wrap a soft measuring tape or a strip of paper around the base of your finger.
  • Mark where the two ends meet.
  • Measure the length of the strip to find the circumference of your finger.
  • Refer to the size chart to find the corresponding ring size.
Using a ring you already own
  • Take a ring that fits well on the finger you plan to wear your new ring on.
  • Measure the inner diameter of the ring using a ruler or a caliper.
  • Compare it to the size chart to find the matching ring size.
Using our printable ring size guide

    Download Full Size Guide PDF

    Additional Tips

    Finger size can change throughout the day: Your fingers might swell or shrink due to temperature or other factors. It's best to measure at the end of the day or when your fingers are at their normal size.
    Finger size varies between hands: Ensure you measure the exact finger you’re buying the ring for, as finger sizes differ between hands.