Ring size chart
The following chart is useful to see how the sizes compare. Use a piece of string or a soft measuring tape to measure the circumference of your finger and refer to the chart for your correct size.

UK: Diameter mm Circumference mm American
A 11.5
 37.50 0.5
B 12.3
 38.75 1
C 12.7
 40.00 1.5
D 13.1
 41.25 2
E 13.5
 42.50 2.5
F 13.9
 43.75 3
G 14.3
 45.00 3.25
H 14.7
 46.25 3.75
I 15.1
 47.50 4.25
J 15.5
 48.75 4.5
K 15.9
 50.00 5
L 16.3
 51.25 5.5
M 16.7
 52.50 6
N 17,1
 53.75 6.5
O 17.5
 55.00 7
P 17.9
 56.25 7.5
Q 18.3
 57.50 8
R 18.7
 58.75 8.5
S 19.1
 60.00 9
T 19.5
 61.25 9.5
U 19.9
 62.50 10
V 20.3
 63.75 10.5
W 20.7
 65.00 11
X 21.1
 66.25 11.5
Y 21.5
 67.50 12
Z
 21.9
 68.75 12.5
Z+1
 22.3
 69.99
  
Z+2
 22.7
 71.31
  
Z+3
 23.1
 72.57
  
Z+4
 23.5
 73.83
  
Z+5
 23.9
 75.08
  
Z+6
 24.3
 76.34
  
Z+7
 24.7
 77.60
  
Z+8
 25.1
 78.86


 


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