Nib Width Sizes
Unfortunately, the majority of nib manufacturers do not use a sensible numbering system for their nib sizes.
Just because the nib says ‘4’ on it, it does not mean the actual nib width is 4mm!
We have created a PDF to download, which gives you the nib widths in millimetres of Brause, Leonardt, Speedball and William Mitchell edged nibs.
Download Nib Width Sizes Chart