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Check your Ring Size

 

When buying rings online or ordering custom-made rings, it's vital to ensure you choose the right ring size. That's why we've produced these handy international ring size charts & tools below, cross referencing ring sizes in different international markets. 

 

Ring Size Automatic Convertor:

 

Convert your Ring Size to the ring size used in other countries using the following form. Select a ring size in any one category, the rest will change to match.

USA size Diam. inch. Diam. mm Circum. mm
British French German Japanese Swiss

 

 

Steps to Manually Determine your Ring Size:

 

  • Wrap a piece of string or a strip of paper around your finger.
  • Mark the point where the two ends meet.
  • Measure the string or paper against a ruler to get the circumference of your finger.
  • Divide that by 3.14 to get the diameter of your finger.
  • Look up your ring size using the form above.
  • Recheck using the downloable Ring Sizer file available below.

 

 

Downloadable Ring Sizers:

 

Ring Sizer

 

Alternative Ring Sizer

 

 Note: You will need Adobe Reader to open the Ring Sizer files. Latest version of Adobe Reader can be downloaded here.

 

 

Ring Size Chart:

 

All sizes are approximate equivalents

USA & Canadian  Standard

Inside Diameter

Inside Circumference

Equivalents

Ring Sizes

mm / inches

mm / inches

Ireland, British & Australia

French

German

Japanese

1½

12.78 / .503

40.2 / 1.580

C

40½

12¾

—

2

13.21 / .520

41.5 / 1.634 

D 

41½

13¼

2

2½

13.61 / .536

42.7 / 1.684

E

42¾

13¾

3

3

14.04 / .553

44.0 / 1.739

F

44

14

4

3½

14.45 / .569

45.2 / 1.788

G

45¼

14½

—

4

14.86 / .585

46.5 / 1.836

H½

46½

15

7

4½

15.27 / .601

47.8 / 1.888

I½

47¾

15¼

8

5

15.70 / .618

49.0 / 1.941

J½

49

15¾

9

5½

16.10 / .634

50.2 / 1.992

L

50¼

16

—

 6

16.51 / .650

51.5 / 2.042

M

51½

16½

12

 6¼

N/A

N/A

M ½

N/A

N/A

N/A

6½

16.92 / .666

52.8 / 2.092

N

52¾

17

13

7

17.35 / .683

54.0 / 2.146

N½

54

17¼

14

7½

17.63 / .699

55.3 / 2.196

O½

55½

17½

15

8

18.19 / .716

56.6 / 2.249

P½

56¾

18

16

8½

18.59 / .732

57.8 / 2.300

Q½

58

18½

17

9

18.99 / .748

59.1 / 2.350

R½

59¼

19

18

9½

19.41 / .764

60.3 / 2.400

S½

60½

19½

19

10

19.84 / .781

61.6 / 2.463

T½

61¾

20

20

10½

20.24 / .797

62.8 / 2.504

U½

62¾

20¼

22

11

20.68 / .814

64.1 / 2.567

V½

64¼

20¾

23

11½

21.01 / .830

66.0 / 2.608

W½

66

21

24

12

21.41 / .846

67.3 / 2.658

Y

67¼

21½

25

 

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