Orleans Counterfeit Diamonds

Table of International Ring Size Equivalents
United States Standard (Including Canada)  Average Diameter In Inches British Equivalent French Equivalent German Equivalent Japanese Equivalent Swiss Equivalent

000

.390
          

00

.422
          

0

.454
          

1/2

 A
        

3/4

 A-1/2
        

1

.487

B
    

1
  

1 1/4

 B-1/2
        

1 1/2

.503

C
        

1 3/4

C-1/2
        

2

.520

D

41 1/2

13 1/4

2

1 1/2

2 1/4

D-1/2
        

2 1/2

.536

E

42 3/4

13 3/4

3

2 3/4

2 3/4

E-1/2
        

3

.553

F

44

14

4

4

3 1/8

F-1/2
      

3 3/8

G

45 1/4

5

5 1/4

3 1/2

.569
    

14 1/2 

 

  

3 5/8

G-1/2
  

6
  

3 3/4

H

46 1/2
    

6 1/2

4

.585

H-1/2

15

7

4 1/4
  

I

47 3/4
    

7 3/4

4 1/2

.601

I-1/2

15 1/4

8
  

4 7/8

J

49

9

5

.618

J-1/2
  

15 3/4

9
  

5 1/8

K

50

10

5 3/8

K-1/2
  

10
  

5 1/2

.634

L

51 3/4

16

11 3/4

5 7/8

L-1/2
    

11

6

.650

M

52 3/4

16 1/2

12

12 3/4

6 1/4

M-1/2
        

6 1/2

.666

N

54

17

13

14

6 3/4

N-1/2
    

7

.683

O

 55 1/4

17 1/4

14

15 1/4

7 1/4

O-1/2
        

7 1/2

.699

P

56 1/2

17 3/4

15

16 1/2

7 3/4

P-1/2
        

8

.716

Q

57 3/4

18

16

17 3/4

8 1/4

Q-1/2
        

8 1/2

.732
    

18 1/2

17

8 5/8

R

59
    

19

8 7/8

R-1/2

9

.748
    

19

18
  

9 1/8

S

60 1/4
  

20 1/4

9 3/8

S-1/2
        

9 1/2

.764

 

19 1/2

19

9 5/8
  

T

61 1/2
    

21 1/2

10

.781

T-1/2
  

20

20
  

10 1/4
  

U

62 3/4
  

21

22 3/4

10 1/2

.797

U-1/2
  

20 1/4

22
  

10 5/8
  

V

63 3/4
    

23 3/4

11

.814

V-1/2
  

20 3/4

23
  

11 1/8
  

W

65
    

25

11 3/8
  

W-1/2
        

11 1/2

.830
    

21

24
  

11 5/8
  

X

66 1/4
    

26 1/4

11 7/8
  

X-1/2
        

12

.846

Y

67 1/2

21 1/4

25

27 1/2

12 1/4
  

Y-1/2
        

12 1/2

.862

Z

68 3/4

21 3/4

26

28 3/4

12 3/4
  

Z-1/2
        

13

.879
    

22

27
  
 
This is a reference chart to check international ring sizes to the American standard size.
 
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