Quote Originally Posted by DickM
Here you go Gramps...................
Silk Lines were sized by the diameter of the end-middle-end (double taper silk line) or end-middle (half of a double taper silk line)

I-(0.022" dia)
H-(0.025" dia) 2 Wt
G-(0.030" dia) 3 Wt
F-(0.035" dia) 4 Wt
E-(0.040" dia) 5 Wt
D-(0.045" dia) 6 Wt
C-(0.050" dia) 7 Wt
B-(0.055" dia) 8 Wt
A-(0.060" dia) 9 Wt
Excellent information. Thank you!