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Ring Sizing Guide

Helpful Tips for Sizing

  • Pay attention to these factors for a best fit: Water weight, bloating, sodium, weather and even alcohol can cause your finger size to fluctuate between 1/2 to 1 whole size, therefore it's best to be aware of these factors when you and/or your partner are getting sized.

  • Opt for a snug fit when purchasing a top heavy ring, or engagement style ring. For engagement or top heavy rings (rings with mounted gemstones), choose .25 smaller, or a snug fit as the ring may twist and turn easily. Additionally, soon after your finger gets used to wearing the ring, the ring will begin to feel loose.Contrary to custom belief, it's actually safer to go up in size, rather than going down in size, especially if there are many side stones or a complex design. Opening a ring to make it wider will actually add tension to the tiny mounts for the side stones, versus opening the ring to make it smaller may decrease the tension, causing the diamonds to become loose and potentially falling out. Sizing should always be evaluated and performed by a master bench jeweler. 

  • Opt for a loose fit when purchasing an eternity band or eternity style ring mount: Eternity means diamonds or design patterns that go all of the way around a ring. Eternity rings can never be sized up or down, because it may break the pattern of diamonds or designs and potentially ruin the structure of the ring. There are two ways way to adjust for small size fluctuations, we can design a thicker interior that can be polished down if to increase the size of circumference, or you can have it made .25-.50 sizes bigger and add "shots" if needed to make it more snug. The sizing shots are semi-permanent and can be removed if needed.

  • Size Estimates: Did you know that most people generally fit within 3/4th size down, and up to 1.5-2 sizes up comfortably? The circumference of your finger varies at different points, i.e. on the same finger, the size of the knuckle is usually about .1/2 to 1 whole size bigger than the base of the finger, generally the smallest point. Though it is always better to get an exact fit, it is not something to be too concerned about. Most rings can be sized safely down 1 size, and sized up 2 sizes however to be certain, check with a trained jeweler as some mountings have stipulations on sizing.

  • How to Size Wide Bands: Did you know that wide bands tend to feel more snug? When designing a wide band, we usually measure your true fit using a wider sizer and the size usually comes out to be about .5-.75 wider than normal. It is important to measure the base of the finger, the middle, and the knuckle and get an average of the 3. This generally comes out to be about .5-.75 size larger.

  • If your ring is too big or spins a lot, and a trained jeweler does not recommend sizing it down due to ruining the structural integrity of the ring, then the best option is to add a bridge or shots. These precious metal balls that go in the interior of the ring are miracle workers! Read more about them here.
  • Sizing Belts which can be used at home can be purchased here.
  • Free Printable Sizing PDF

International Ring Size Conversion Chart

Inside Diameter 

Inside Circumference

Sizes

MM

Inches

MM

Inches

British & Australian

 US & Canada

French & Russian

German

Japanese

Swiss

9.91

0.390

31.13

1.22

-

0000

-

-

-

-

10.72

0.442

33.68

1.39

-

00

-

-

-

-

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

-

-

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

41 1/2

13 1/2

2

1 1/2

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

42 3/4

13 3/4

3

2 3/4

13.83

0.544

43.45

1.71

E 1/2

2 3/4

-

-

-

-

14.05

0.553

44.14

1.74

F

3

44

14

4

4

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

45 1/4

-

5

5 1/4

14.45

0.569

45.40

1.79

G 1/4

3 1/2

-

14 1/2

-

-

14.56

0.573

45.74

1.80

G 1/2

3 5/8

-

-

6

-

14.65

0.577

46.02

1.81

H

3 3/4

46 1/2

-

-

6 1/2

14.86

0.585

46.68

1.84

H 1/2

4

-

15

7

-

15.04

0.592

47.25

1.86

I

4 1/4

47 3/4

-

-

7 3/4

15.27

0.601

47.97

1.89

I 1/2

4 1/2

-

15 1/4

8

-

15.40

0.606

48.38

1.90

J

4 5/8

49

15 1/2

-

9

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 3/4

9

-

15.80

0.622

49.64

1.95

K

5 1/8

50

-

-

10

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

-

-

10

-

16.10

0.634

50.58

1.99

L

5 1/2

51 3/4

16

-

11 3/4

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

52 3/4

16 1/2

12

12 3/4

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

54

17

13

14

17.13

0.674

53.82

2.12

N 1/2

6 3/4

-

-

-

-

17.35

0.683

54.51

2.15

O

7

55 1/4

17 1/4

14

15 1/4

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

56 1/2

17 3/4

15

16 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

57 3/4

18

16

17 3/4

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 1/2

17

-

18.61

0.733

58.47

2.30

R

8 5/8

59

-

-

19

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

18

-

19.10

0.752

60.00

2.36

S

9 1/8

60 1/4

-

-

20 1/4

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 1/2

19

-

19.51

0.768

61.29

2.41

T

9 5/8

61 1/2

-

-

21 1/2

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

20

-

20.02

0.788

62.89

2.48

U

10 1/4

62 3/4

-

21

22 3/4

20.20

0.797

63.46

2.50

U 1/2

10 1/2

-

20 1/4

22

-

20.32

0.800

63.84

2.51

V

10 5/8

63

-

-

23 3/4

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 3/4

23

-

20.76

0.817

65.22

2.57

W

11 1/8

65

-

-

25

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

24

-

21.18

0.834

66.54

2.62

X

11 5/8

66 1/4

-

-

26 1/4

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

67 1/2

21 1/4

25

27 1/2

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

68 3/4

21 3/4

26

28 3/4

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

27

-

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

-

-

-

-

-

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