All of our rings are listed using US sizing. Refer to our ring conversion chart below, to make sure you order the correct size.

U.S. Ring Size

U.K. Ring Size

Circumference

(mm)

Diameter

(mm)

4 1/2

I 1/2

48

15.2

5

J 1/2

49

15.6

5 1/2

K 1/2

51

16

6

L 1/2

52

16.5

6 1/2

M 1/2

53

17.0

7

N 1/2

55

17.3

7 1/2

O 1/2

56

17.7

8

P 1/2

57

18.2

8 1/2

Q 1/2

58

18.6

9

R 1/2

59

19.0

9 1/2

S 1/2

61

19.4

10

T 1/2

62

19.8

10 1/2

U 1/2

63

20.2

11

V 1/2

65

20.6

11 1/2

W 1/2

66

21.0

12

X 1/2

68

21.4

12 1/2

Y 1/2

69

21.

Refer to our measuring guide below to find the right ring size for you.

To measure using your finger circumference:
  1. Wrap a string around your finger where you’d like your ring to be.
  2. To find your best fit, make sure that the string is pulled snugly around your finger but not too tight, it must slide easily around your finger.
  3. Mark the spot where the two ends of the string meet and measure the distance with a ruler in millimeters.
  4. Use the chart below to determine your ring size.
 
To measure using the diameter of an existing ring:
  1. Using a ring you already own that fits well, measure the inside diameter of the ring with a ruler in millimeters
  2. Note down the measurement and match it to the chart below.
  3. If your size falls in-between two sizes we suggest buying the larger size.
  4. If you are still unsure about your ring size and you would like further assistance, please contact us at customercare@ethosoflondon.com