STANDARD NIB SIZES (Excluding Oblique Cut Nibs)
BB - B - M - F - EF - STUB - ITALIC
STANDARD NIB SIZES (Including Oblique Cut Nibs)
BB - B - M - F - EF - OBR - OBL - OMR - OML - STUB - ITALIC
NIB HARDNESS SCALE (My Own)
2H - H - HF - F - 2F
(Double Hard - Hard - Semiflexible - Flexible - Super-flexible)