Searching “free mandala templates” on line will bring up plenty.
These are ones arayti (Virginia) posted on Ravelry, many of which she created herself. She reportedly would bring up the image on her screen and trace it from there.
Their companion PDFs (shown small at each lower left) will print the full width of either A4 or 8.5”x11” paper, or can be scaled to size using the % function in your printer. They are not yet linked.
See also Her Google Drive collection (with some duplication).

















