Seyes ruled paper, US Letter
The French ruling on the paper North American printers actually hold. Same 8 mm system, no A4 required.
Opens with these settings already loaded. Change anything you like, then download as PDF, PNG or SVG.
Why this page exists at all
Seyes paper is A4 paper in France, and anywhere with A4 in the printer the A4 version is the right file. This one is for the people who need French ruling and do not have A4: students in French immersion programs in the United States and Canada, adults learning French cursive, teachers running a French class in a building stocked entirely with Letter. Buying a ream of A4 to satisfy a paper convention is a silly tax on wanting to write properly.
You lose two rows and nothing else
US Letter is 279 mm tall against A4 at 297 mm, so at 8 mm squares you fit roughly two fewer rows down the page. Letter is also 6 mm wider, which gains you most of a column back across. The ruling itself is untouched, since the 8 mm square and the 2 mm interlignes are absolute measurements rather than fractions of the sheet. A line of writing on this page is identical to a line of writing on a French cahier. There is simply slightly less page under it.
Print it at true size or the exercise is pointless
This matters more here than on most sheets on this site. The entire function of Seyes ruling is that a 2 mm band is 2 mm, because that is the height a child is being trained to write. If your print dialog scales the page to fit, every band comes out around 1.9 mm and the proportions you are practicing are quietly wrong. Set the scale to 100 percent, or check what your printer is doing once and then stop worrying about it.
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.