Nib Analyzer
Estimate the nib width used by comparing stroke thickness.
| Nib Classification | Approximate Width (mm) | Historical Notes |
|---|---|---|
| Extra Fine (EF) | 0.3mm - 0.4mm | Common in early 20th century European pens. |
| Fine (F) | 0.4mm - 0.5mm | Standard for general correspondence. |
| Medium (M) | 0.6mm - 0.7mm | Preferred for signatures by many modern politicians. |
| Broad (B) | 0.8mm - 0.9mm | Often used by entertainers for large format photos. |