All rings outside of eternity bands, can be resized at any time and 1 free resize is included in your purchase.

Using an existing ring is one of the best ways to figure out you or your partner's ring size if you are unable to be sized by a professional or are trying to keep it a secret!

  • If you or your partner wears rings in general, find one that is closest to that of the intended 'ring' finger. Trace the inside of that ring on a piece of paper and measure the diameter to the most precise mm that you can. That measurement can be used to determine the size of the ring by referencing the table below or this International Ring Size chart.
  • If the band you are using for reference is much thicker than the one you are purchasing you might want to reduce the size by 0.5 or half a size since thick/wide bands fit larger than a super thin band does.

Inside Diameter

Inside Circumference

Sizes

MM

Inches

MM

Inches

British & Australian

US & Canada

9.91

0.390

31.13

1.22

-

0

10.72

0.442

33.68

1.39

-

0

11.53

0.454

36.22

1.43

-

0

11.95

0.474

37.54

1.49

A

1/2

12.18

0.482

38.26

1.51

A 1/2

3/4

12.37

0.487

38.86

1.53

B

1

12.60

0.496

39.58

1.56

B 1/2

1 1/4

12.78

0.503

40.15

1.58

C

1 1/2

13.00

0.512

40.84

1.61

C 1/2

1 3/4

13.21

0.520

41.50

1.63

D

2

13.41

0.528

42.13

1.66

D 1/2

2 1/4

13.61

0.536

42.76

1.68

E

2 1/2

13.83

0.544

43.45

1.71

E 1/2

2 3/4

14.05

0.553

44.14

1.74

F

3

14.15

0.557

44.45

1.75

F 1/2

3 1/8

14.25

0.561

44.77

1.76

F 3/4

3 1/4

14.36

0.565

45.11

1.77

G

3 3/8

14.45

0.569

45.40

1.79

G 1/4

3 1/2

14.56

0.573

45.74

1.80

G 1/2

3 5/8

14.65

0.577

46.02

1.81

H

3 3/4

14.86

0.585

46.68

1.84

H 1/2

4

15.04

0.592

47.25

1.86

I

4 1/4

15.27

0.601

47.97

1.89

I 1/2

4 1/2

15.40

0.606

48.38

1.90

J

4 5/8

15.53

0.611

48.79

1.92

J 1/4

4 3/4

15.70

0.618

49.32

1.94

J 1/2

5

15.80

0.622

49.64

1.95

K

5 1/8

15.90

0.626

49.95

1.97

K 1/4

5 1/4

16.00

0.630

50.27

1.98

K 1/2

5 3/8

16.10

0.634

50.58

1.99

L

5 1/2

16.30

0.642

51.21

2.02

L 1/4

5 3/4

16.41

0.646

51.55

2.03

L 1/2

5 7/8

16.51

0.650

51.87

2.04

M

6

16.71

0.658

52.50

2.07

M 1/2

6 1/4

16.92

0.666

53.16

2.09

N

6 1/2

17.13

0.674

53.82

2.12

N 1/2

6 3/4

17.35

0.683

54.51

2.15

O

7

17.45

0.687

54.82

2.16

O 1/2

7 1/4

17.75

0.699

55.76

2.20

P

7 1/2

17.97

0.707

56.45

2.22

P 1/2

7 3/4

18.19

0.716

57.15

2.25

Q

8

18.35

0.722

57.65

2.27

Q 1/2

8 1/4

18.53

0.729

58.21

2.29

Q 3/4

8 1/2

18.61

0.733

58.47

2.30

R

8 5/8

18.69

0.736

58.72

2.31

R 1/4

8 3/4

18.80

0.740

59.06

2.32

R 1/2

8 7/8

18.89

0.748

59.34

2.35

R 3/4

9

19.10

0.752

60.00

2.36

S

9 1/8

19.22

0.757

60.38

2.38

S 1/4

9 1/4

19.31

0.760

60.66

2.39

S 1/2

9 3/8

19.41

0.764

60.98

2.40

S 3/4

9 1/2

19.51

0.768

61.29

2.41

T

9 5/8

19.62

0.772

61.64

2.43

T 1/4

9 3/4

19.84

0.781

62.33

2.45

T 1/2

10

20.02

0.788

62.89

2.48

U

10 1/4

20.20

0.797

63.46

2.50

U 1/2

10 1/2

20.32

0.800

63.84

2.51

V

10 5/8

20.44

0.805

64.21

2.53

V 1/4

10 3/4

20.68

0.814

64.97

2.56

V 1/2

11

20.76

0.817

65.22

2.57

W

11 1/8

20.85

0.821

65.50

2.58

W 1/4

11 1/4

20.94

0.824

65.78

2.59

W 1/2

11 3/8

21.08

0.830

66.22

2.61

W 3/4

11 1/2

21.18

0.834

66.54

2.62

X

11 5/8

21.24

0.836

66.73

2.63

X 1/4

11 3/4

21.30

0.839

66.92

2.64

X 1/2

11 7/8

21.49

0.846

67.51

2.66

Y

12

21.69

0.854

68.14

2.68

Y 1/2

12 1/4

21.89

0.862

68.77

2.71

Z

12 1/2

22.10

0.870

69.43

2.73

Z +1/2

12 3/4

22.33

0.879

70.15

2.76

Z+1

13

22.60

0.890

71.00

2.80

Z+1.5

13.5

22.69

0.893

71.28

2.81

Z+2

-

22.92

0.902

72.00

2.83

Z+2.5

-

23.06

0.908

72.45

2.85

Z+3

-

23.24

0.915

73.01

2.87

Z+3.5

-

23.47

0.924

73.73

2.90

Z+4

-

23.55

0.927

73.98

2.91

Z+4.5

-

23.87

0.940

74.99

2.95

Z+5

-

24.27

0.956

76.25

3.00

Z+6

-

Other helpful things to note:

  • The average women's ring size is 6.5-7 and the average ring size for men is about 9-10.
  • You want the ring to fit snug and secure on the finger to avoid the ring spinning the stone around to the bottom of your finger while you wear it. It is ok if it's a little hard to get over the knuckle as long as it's comfortable while you wear it. Many people have larger knuckles than their finger, and so it is always recommended to try and get sized by a professional when possible to determine the best fit for you.

For any further assistance please contact info@ringcometrue.com.