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Don't worry if you don't know your ring size, there is a simple and easy way to find out.

Wrap a piece of string or tape measure around your finger and mark the point where the string overlaps and work out the size in millimetres. Unwrap the string or paper from your finger, and measure the length from the start of the string or paper to the mark that you have made in MM.
 
Then, find out your ring size using the chart below:
 

Size

Diameter mm

Circumference mm

K

15.9

49.95

L

16.3

51.24

M

16.7

52.46

N

17.1

53.72

O

17.5

54.98

P

17.9

56.23

Q

18.3

57.49

R

18.7

58.75

S

19.1

60.00