Circumference (cm)

Ring Inner Diameter (cm)

Ring Size (in Hong Kong size)

5.0

1.55

8

5.2

1.61

10

5.4

1.65

12

5.6

1.75

14

5.8

1.82

16

5.2

1.91

18

6.0

1.96

20

6.4

2.04

22

6.6

2.12

24

6.8

2.18

26

7.0

2.2

28