Standard drafting pen sizes, line weights, and thicknesses

Since I never can seem to find this information when I want it, I am posting here the standard drafting pen weights and thicknesses as used by the pen manufacturer Koh-I-Noor.

Pen size	Line thickness (mm)
000000	0.13
0000	0.18
000	0.25
00	0.30
0	0.35
1	0.50
2	0.60
2.5	0.70
3	0.80
3.5	1.0
4	1.2
6	1.4