How to Make Sure Your Ring Size?

Inter- Diameter
(mm)

Hong Kong
Size

American
Size

United Kingdom
Size

Japan
Size

Switzerland
Size

14.1

6

3

F

4

4

14.3

7

3.25

F 1/2

5

5.25

14.7

8

3.75

G

6

6.5

14.9

9

4

H

7

7

15.3

10

4.5

I

8

8.5

15.7

11

5

J 1/2

9

9.5

16.1

12

5.5

K 1/2

10

10.5

16.5

13

6

L 1/2

11

12.75

16.7

14

6.25

M

12

13.5

17.1

15

6.75

N

13.5

14.5

17.3

16

7

N 1/2

14

15.25

17.7

17

7.5

O 1/2

15

16.5

18.2

18

8

P 1/2

16.25

18.25

18.5

19

8.5

Q 1/2

17

18.75

18.8

20

9.75

R

17.5

19

19.1

21

9.25

S

18

20

19.4

22

9.5

S 1/2

19

20.75

19.8

23

10

T 1/2

20

21.75

20.2

24

10.5

U 1/2

22

22.75

20.6

25

11

V 1/2

23

24.75

21.0

26

11.5

W 1/2

24

26.25

21.2

27

12

X

24.5

26.75

21.6

28

12.25

Y

25.5

28

22.0

29

12.5

Z 1/2

26.5

29

The most accurate way to get your ring size is to measure your size with rope and ruler. After measuring the size, you can find your ring size by checking the size chart below.