Ring Size Chart

Here are some tips to help you determine your ring size:

What is my Ring Size?

Here are some tips to help you determine your ring size:
1. Use the strip of paper to measure the inner side of your existing ring.
2. Mark the point where the two ends meet.
3. To find out the internal circumference of your ring, measure the paper or string against a ruler or measuring tape.
4. To derive the diameter of your finger, divide the circumference by 3.14.

Diameter 
(mm)

Circumference 
(length in mm)

Europe 
ring size

USA 
ring size

British/UK 
ring size

Hongkong 
ring size

Japan 
ring size

Diameter 
(inch)

Circumference 
(length in inch)

13.37

42

42

1.5

A

3

2

0.526

1.65

13.689

43

43

2

B

5

3

0.539

1.69

14.007

44

44

2.5

C

6

4

0.551

1.73

14.326

45

45

3

D

7

5

0.564

1.77

14.644

46

46

3.5

E

8

6

0.577

1.81

14.963

47

47

4

F

9

7

0.589

1.85

15.281

48

48

4.5

G

10

8

0.602

1.89

15.6

49

49

5

H

11

9

0.614

1.93

15.918

50

50

5.5

I

12

10

0.627

1.97

16.236

51

51

6

J

12.5

11

0.639

2.01

16.554

52

52

6.5

K

13

12

0.652

2.05

16.873

53

53

7

L

14.5

13

0.664

2.09

17.191

54

54

7.5

M

16

14

0.677

2.13

17.509

55

55

8

N

17

15

0.698

2.17

17.828

56

56

8.5

O

18

16

0.702

2.2

18.146

57

57

9

P

19

17

0.714

2.24

18.465

58

58

9.5

Q

20.5

18

0.727

2.28

18.783

59

59

10

R

22

19

0.739

2.32

19.101

60

60

10.5

S

23

20

0.752

2.36

19.42

61

61

11

T

23.5

21

0.765

2.4

19.738

62

62

11.5

U

24

22

0.777

2.44