Nib sizes table

Sigla	Dimensione
EF	Extra-fine
F	Fine
M	Medium
O	Oblique Medium
B	Broad
BB	Double broad
BBB	Triple broad
OF	Oblique fine
OB	Oblique broad
OBB	Oblique double broad
M	Music nib
KF	Kugel fine
KM	Kugel medium
KB	Kugel broad