On iPhone or iPad
Open the saved PDF in Files or Books, tap Share, then Print. Choose the printer, the pages and, if it is offered, the paper size that matches the PDF. The print panel has no scale setting, so print the 50 mm square from the print size checker once and measure it before printing graph paper or planner pages.
On Android
In Chrome, follow the steps at the top of this guide. In a PDF app or Google Drive, open the menu and tap Print. Choose your printer and the paper size that matches the PDF. If the print service offers a fit or scale option, choose Actual size or 100%. The options depend on the app and the print service.
On a Chromebook
Open the PDF in Chrome and press Ctrl + P. Open More settings, check the paper size and set Scale to Custom, 100. Save the PDF instead if you are taking it to a shop.