Inside Diameter mm

Finger Circumference mm

Size

UK/AU Size

15.9
16.5
16.9
17.4
17.8
18.2
18.5
18.9
19.4
19.8
20.2
20.7
21.1
21.5
21.9
22.3
22.6

50
51.9
53.2
54.5
55.8
57.2
58.2
59.3
61
62.3
63.5
65
66.2
67.5
68.8
70.2
71

5.25
6
6.5
7
7.5
8
8.5
9
9.5
10
10.5
11
11.5
12
12.5
13
13.5

K 1/4
M
N
O
P
Q
Q 3/4
R 3/4
S 3/4
T 1/2
U 1/2
V 1/2
W 3/4
Y
Z
Z+1
Z+2