Brush lettering practice paper
Large ruling with a gentle slant, sized for brush pens rather than for a nib.
Opens with these settings already loaded. Change anything you like, then download as PDF, PNG or SVG.
Brush pens need more room than nibs
A brush tip needs travel to build a stroke, and the thick-to-thin transition that defines brush lettering happens across the length of a downstroke. Ruled too small, there is no distance over which to make that transition and every letter comes out uniformly thick. The 10 mm x-height here is a starting point for a medium brush pen. Go larger for a big brush, smaller only once the pressure control is reliable.
Pressure, not pen angle
This is the difference from broad-edge hands like italic or blackletter, where a fixed nib angle produces the stroke contrast automatically. With a brush you make the contrast yourself: heavy pressure on downstrokes, light on upstrokes, and the whole craft is in the consistency of that alternation. Guides help with slant and height but cannot help with pressure, which only repetition fixes.
Paper matters more here than almost anywhere
Brush tips are destroyed by toothy paper. A rough surface frays the fibers within a few pages and the tip never recovers its point. Print practice sheets on the smoothest paper you have, and if you are serious about a particular pen, print the guides and slip them under a sheet of smooth marker paper to trace through rather than writing on the printed sheet at all.
Printing it accurately
This only measures correctly if your printer doesn't rescale the page. In the print dialog set Scale: 100%, not "Fit to page" or "Shrink oversized pages". If you're not sure it worked, print the calibration page, measure the ruler on it with a real ruler, and it will tell you exactly what your printer is doing to the page.