This generator makes this type of graph paper.
The "Unit Size" is the size of the nib in millimeters. Interline spacing is how close each of the guideline sets are to each other.
This generator creates guides of the standard 3/2/5/5 ratio (ascender 1, ascender 2, body, descender). Number of lines on a page are a function of unit size, spacing, and paper size. They cannot be set directly.