radius2 (gu)
Diameter (gu)
41
43
45
47
49
51
53
55
57
59
61
63
65
67
69
12.8
13.12
13.42
13.72
14
14.28
14.56
14.84
15.1
15.36
15.62
15.88
16.12
16.38
16.62