Elongated Cushion Moissanite Ceremonial Solitaire

Circumference (mm)

Inside Diameter (mm)

Australia, United Kingdom & New Zealand

United States & Canada

44.2

14.1

F

3

44.8

14.3

F½

3¼

45.5

14.5

G

3½

46.1

14.7

G½

3¾

46.8

14.9

H

4

47.4

15.1

H½

4¼

48

15.3

I

4½

48.7

15.5

J

4¾

49.3

15.7

J½

5

50

15.9

K

5¼

50.6

16.1

K½

5½

51.2

16.3

L

5¾

51.9

16.5

L½

6

52.5

16.7

M

6¼

53.1

16.9

M½

6½

53.8

17.1

N

6¾

54.4

17.3

N½

7

55.1

17.5

O

7¼

55.7

17.7

O½

7½

56.3

17.9

P

7¾

57

18.1

P½

8

57.6

18.3

Q

8¼

58.3

18.5

Q½

8½

58.9

18.8

R

8¾

59.5

19.0

R½

9

60.2

19.2

S

9¼

60.8

19.4

S½

9½

61.4

19.6

T

9¾

62.1

19.8

T½

10

62.7

20.0

U

10¼

63.4

20.2

U½

10½

64

20.4

V

10¾

64.6

20.6

V½

11

65.3

20.8

W

11¼

65.9

21.0

W½

11½

66.6

21.2

X

11¾

67.2

21.4

X½

12

67.8

21.6

Y

12¼

68.5

21.8

Z

12½