Ring Sizer

Please note this is a guide only based on a standard ring width. A wider ring will require a larger ring size. 

 

UK SIZE

EU SIZE

DIAMETER

F

44

14.1mm

F 1/2

45

14.3mm

G

46

14.5mm

G 1/2

46

14.7mm

H

47

14.9mm

H 1/2

47

15.1mm

I

48

15.3mm

I 12

48

15.4mm

J

49

15.5mm

J 1/2

49

15.7mm

K

50

15.9mm

K 1/2

51

16.1mm

L

51

16.3mm

L 1/2

52

16.5mm

M

53

16.7mm

M 1/2

53

16.9mm

N

54

17.1mm

N 1/2

55

17.3mm

O

55

17.5mm

O 1/2

56

17.7mm

P

56

17.9mm

P 1/2

57

18.1mm

Q

58

18.3mm

Q 1/2

58

18.5mm

R

59

18.7mm

R 1/2

60

19.0mm

S

60

19.2mm

S 1/2

61

19.4mm

T

61

19.5mm

T 1/2

62

19.8mm

U

63

20.0mm

U 1/2

63

20.2mm

V

64

20.4mm

V 1/2

65

20.6mm

W

65

20.8mm

W 1/2

66

21.0mm

X

67

21.2mm

X 1/2

67

21.4mm

Y

68

21.6mm

Y 1/2

68

21.7mm

Z

69

21.8mm

Z 1/2

69

22.0mm