How to measure the ring size

1. Wrap a piece of string or a strip of 1/4 inch wide paper around your finger.
   Make sure it will go over knuckle. 
2. Mark the point where the two ends meet. 
3. Measure the string or paper against a ruler. 
4. Compare your measurement to the chart below.

Here are some tips to make your ring size measurement more accurate: 

- Confirm the printed paper size with a ruler.
- Pull tightly. The size must fit snugly to produce an accurate size.
- Don't measure cold fingers. This is when fingers are their smallest.
- For the most accurate reading, measure your finger at the end of the day when it is largest.

Conversion Chart for Ring Sizes: 


Size (inches)

Size (mm)

Diameter (mm)

U.S.A. size

Japanese size

British size

German size

Swiss size

Australian size

Italian size

French size

1 14/16

48

15.27

4 1/2

8

I - 1/2

15 1/4

--

I 1/2

8

--

1 15/16

49

15.70

5

9

J 1/2

15 3/4

--

J 1/2

9.5

--

2

51

16.10

5 1/2

11

L

16

11 3/4

L

10.5

51 3/4

2 1/16

52

16.51

6

12

M

16 1/2

12 3/4

M

11.5

52 3/4

2 2/16

53

16.92

6 1/2

13

N

17

14

N

13

54

2 3/16

55

17.35

7

14

O

17 1/4

15 1/4

O

14.5

55 1/4

2 4/16

56

17.75

7 1/2

15

P

17 3/4

16 1/2

P

16

56 1/2

2 5/16

57

18.19

8

16

Q

18

17 3/4

Q

17

57 3/4

2 6/16

58

18.53

8 1/2

17

Q 1/2

18 1/2

--

Q 1/2

18.5

58

2 7/16

59

18.89

9

18

R 1/2

19

--

R 1/2

19.5

59 1/4

2 8/16

61

19.41

9 1/2

19

S 1/2

19 1/2

--

S 1/2

21

60 1/2

2 9/16

62

19.84

10

20

T 1/2

20

--

T 1/2

22

61 3/4

2 10/16

63

20.20

10 1/2

22

U 1/2

20 1/4

--

U 1/2

23.5

62 3/4

2 11/16

65

20.68

11

23

V 1/2

20 3/4

--

V 1/2

25

64 1/4

2 12/16

66

21.08

11 1/2

24

W 1/2

21

--

W 1/2

26.5

66

2 13/16

68

21.49

12

25

Y

21 1/4

27 1/2

Y

27.5

67 1/2

2 14/16

69

21.89

12 1/2

26

Z

21 3/4

28 3/4

Z

28.5

68 3/4

2 15/16

70

22.33

13

27

--

22

--

--

30

--

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