Nielsen Jewelers: Custom Jewelry

 

Ring size information with North American, British French, German, Japanese, and Swiss cross-reference data. We offer this information as a courtesy to our international customer as well as those that deal in the international jewelry market.

North American Standard

Diameter
 (inches)

Diameter
 (mm)

Metric Size
(mm)

British
Equivalent 

French
Equivalent 

German
Equivalent 

Japanese
Equivalent  

Swiss
Equivalent  

000

.394

10.01

 31.41     10    

00

.426

10.82

 33.93          

0

.458

11.63

 36.44          

1/4

.466

11.84

 37.07

 

 37      

1/2

.474

12.04

 37.70

A

 38 12    

3/4

.482

12.24

 38.33

A 1/2

   12 1/4    

1

.487

12.37

38.95

B

 39  

1

  

1 1/8

.494

12.55

39.27

 

   12 1/2    

1 1/4

.498

12.65

39.58

B 1/2

 39 1/2      

1 1/2

.506

12.85

40.21

C

        

1 3/4

.514

13.06

40.84

C 1/2

   13    

2

.522

13.26

41.47

D

41 1/2

13 1/4

2

1 1/2

2 1/4

.530

13.46

42.10

D 1/2

42

13 1/2

    

2 1/2

.538

13.66

42.72

E

42 3/4

13 3/4

3

2 3/4

2 3/4

.546

13.87

43.35

E 1/2

        

3

.554

14.07

43.98

F

44

14

4

4

3 1/8

.558

14.17

44.30

F 1/2

        

3 1/4

.562

14.27

44.61

  

44 1/2

14 1/4

    

3 3/8

.566

14.38

44.92

G

45 1/4

  

5

5 1/4

3 1/2

.570

14.48

45.24

    

14 1/2

    

3 5/8

.574

 14.58 45.55

 G 1/2

 45 1/2  

6

  

3 3/4

 .578 14.68 45.87

H

46 1/2

    

6 1/2

3 7/8

 .582 14.78 46.18

 

 46 14 3/4    

4

 .586 14.88 46.49

H 1/2

 46 1/2  

7

  

4 1/4

 .594 15.09 47.12

I 

 47 15  

7 3/4

4 1/2

 .602 15.29 47.75

I 1/2

  

15 1/4

8

  

4 5/8

 .606 15.39 48.07

J

 48

 

  

9

4 3/4

 .610 15.49 48.38     15 1/2    

5

.618

15.70

 49.01

J 1/2

 49

15 3/4

9

  

5 1/8

 .622

15.80

49.32

K

      

10

5 1/4

 .626

15.90

49.64

   49 1/2      

5 3/8

 .630

16.0

 49.95

K 1/2

50

 16

10

  

5 1/2

.634

16.10

50.26

L

 50 1/4    

11 3/4

5 3/4

 .642

16.31

50.89

   51      

5 7/8

 .646

16.41

 51.21

L 1/2

        

6

.650

16.51

51.52

M

52 1/2

16 1/2

12

12 3/4

6 1/4

 .658

16.71

52.15

M 1/2

        

6 1/2

.666

16.92

52.78

N

 52 3/4

17

13

14

6 3/4

 .674

17.12

53.41

N 1/2

        

7

.682

17.32

 54.03

O

54

17 1/4

14

15 1/4
.690 .690 17.53 54.66

O 1/2

   17 1/2    

7 1/2

 .698 17.73 55.29

P

56 1/4

17 3/4

15

16 1/2

7 3/4

 .706

17.93

55.92

P 1/2

   18    

8

 .714 18.13 56.55

Q

 56 1/2   16

17 3/4

8 1/4

 .722

18.34

 57.18

Q 1/2

        

8 1/2

 .730 18.54 57.80    

18 1/2

17

  

8 5/8

 .734 18.64 58.12

R

 58    

19

8 3/4

 .738 18.74 58.43     18 3/4    

8 7/8

 .742 18.85 58.75

R 1/2

        

9

 .746 18.95 59.06   59 19 18  

9 1/8

 .750 19.05 59.38

S

 

    

20 1/4

9 1/4

 .754 19.15 59.69          

9 3/8

.758

 19.25 60.00

S 1/2

 60 19 1/4    

9 1/2

 .762 19.35 60.32      

19

  

9 5/8

 .766 19.46 60.63

T

60 1/2

19 1/2

  

21 1/2

9 3/4

 .770 19.56 60.95   61      

10

 .778 19.76 61.57

T 1/2

   19 3/4

20

  

10 1/4

 .768 19.96 62.20

U

62 1/4

 20

21

22 3/4

10 1/2

 .794 20.17 62.83

U 1/2

  

 

22

  

10 5/8

 .798 20.27 63.15

V

63

 20 1/4  

23 3/4

10 3/4

 .802 20.37 63.46   63 1/2      

11

 .810 20.57 64.09

V 1/2

 64

20 1/2

23

  

11 1/8

 .814 20.67 64.40

W

 64 1/2    

25

11 1/4

 .818 20.78 64.72   64 3/4 20 3/4    

11 3/8

 .822 20.88 65.03

W 1/2

 65      

11 1/2

 .826 20.98 65.34    

21

24

  

11 5/8

.830

 21.08 65.66

X

66 1/2

    

26 1/4

11 3/4

 .834 21.18 65.97   66      

11 7/8

 .838 21.28 66.29

X 1/2

   21 1/4    

12

 .842 21.39 66.60

Y

67 1/2

  

25

27 1/2

12 1/4

 .850 21.59 67.23

Y 1/2

   21 1/2    

12 1/2

 .858 21.79 67.86

Z

 68

21 3/4

26

28 3/4

12 3/4

 .866 22.00 68.49

Z 1/2

 68 1/2 22    

13

 .874 22.20 69.11   69 22 1/2

27

  
13 1/4 .882 22.40 69.74   69 3/4 22 1/2    
13 1/2 .890 22.61 70.37          
13 5/8 .894 22.71 70.68   70 1/2      
13 3/4 .898 22.81 70.99   71      
14 .960 23.01 71.63   71 1/2 23    
14 1/8 .910 23.11 71.94   72      
14 1/4 .914 23.21 72.26          
14 3/8 .918 23.32 72.57   72 1/2      
14 1/2 .922 23.42 72.88   73 23 1/2    
14 3/4 .930 23.62 73.51   73 1/2      

 


Jewelry information

Nielsen Jewelers
753 Broadway
Lorain, Ohio 44052
Telephone: 440.244.4255

Email: Info@nielsen-jewelers.com

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