Ring Size Guide

Just like jean sizes, temperature and speed limits, it's an annoying fact that the world can't agree on a single unit of measure for ring sizes.  So you may find yourself browsing through the shop, confident of your ring size 'M' and wondering why the heck I only offer letter sizes when you're sure all of the shops in your area size with numbers.  But don't worry!  I have you covered!  Click the image below to open my official international ring size conversion chart.  So whether you're an 'M', a '52 1/8' or a '6 1/4', you can be confident you're ordering the right size.

*hint* Pay particular attention to the inside diameter measurement (first column).  If you're getting sized professionally, ask the jeweller to give you this measurement. Every jeweller interprets sizing and conversion slightly differently (just like size 4 jeans fit differently from every store), but this number reflects the actual measurement size of your ring and will always be constant.

Inside Diameter

UK & Australia
Ring Size

EU
Ring Size

US
Ring Size

14.0mm

F

44

3

14.1mm

F 1/2

44 5/8

3 1/4

14.4mm

G

45 1/4

3 1/2

14.6mm

G1/2

45 7/8

3 3/4

14.9mm

H

46 1/2

4

15.0mm

I

47 1/8

4 1/4

15.3mm

I1/2

47 3/4

4 1/2

15.6mm

J

48 3/8

4 3/4

15.8mm

J1/2

49

5

16.0mm

K

49 5/8

5 1/4

16.1mm

K1/2

50 1/4

5 1/2

16.3mm

L

50 7/8

5 3/4

16.4mm

L1/2

51 1/2

6

16.9mm

M

52 1/8

6 1/4

17.0mm

M1/2

52 3/4

6 1/2

17.1mm

N

53 3/8

6 3/4

17.2mm

N1/2

54

7

17.5mm

O

54 5/8

7 1/4

17.9mm

O1/2

55 1/2

7 1/2

18.0mm

P

55 7/8

7 3/4

18.1mm

P1/2

56 3/4

8

18.3mm

Q

57 1/8

8 1/4

18.6mm

Q1/2

58

8 1/2

18.9mm

R

58 3/8

8 3/4

19.0mm

R1/2

59

9

19.1mm

S

59 5/8

9 1/4

19.4mm

S1/2

60 1/4

9 1/2

19.7mm

T

60 7/8

9 3/4

19.9mm

T1/2

61 1/2

10

20mm

U

62 1/8

10 1/4

20.2mm

U1/2

62 3/4

10 1/2

20.4mm

V

63 3/8

10 3/4

20.6mm

V1/2

64

11

20.9mm

W

64 5/8

11 1/4

21mm

W1/2

65 1/4

11 1/2

21.2mm

X

65 7/8

11 3/4

21.5mm

X1/2

66 1/2

12

21.7mm

Y

67 1/8

12 1/4

 

21.9mm

Y1/2

67 3/4

12 1/2

22mm

Z

68 3/8

12 3/4

22.2mm

Z1/2

69

13

22.5mm

Z+1

70 1/8

13 1/4

22.9mm

Z+1.5

71 5/8

13 1/2

23mm

Z+2

72 3/8

13 3/4

23.2mm

Z+2.5

73

14

23.4mm

Z+3

73 3/4

14 1/4

23.6mm

Z+4

74

14 1/2

23.8mm

Z+5

75

14 3/4