Ring Sizes

IRELAND EUROPE USA INNER CIRCUMFERENCE IN MM
A 0.5
B 1 1 41
C 2 1.5 42
D 3 2 43
E 4 2.5 44
F 5 3 45
G 6 3.5 46
H 7 4 47
I 8 4.5 48
J 9 5 49
K 10 5.5 50
L 11 6 51
M 12 6.5 52
N 13 7 53
O 14 7.5 54
P 15 8 55
Q 16 8.5 56
R 17 9 57
S 18 10 58
T 19 10.5 59
U 20 11 60
V 21 11.5 61
W 22 12 62
X 23 12.5 63
Y 24 13 64
Z 25 13.5 65
Z+1 26 66
Z+2 27 67


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