I made a mandala template in Adobe Illustrator a while back. I’ve since switched to designing them digitally now. Hopefully someone out there will find these useful. The circles are spaced a half inch apart and the first few are a quarter inch. Odd and even amounts of sections. Below are links to the Illustrator files and Jpegs of them as well. Free to use and distribute as you see fit, just link back here or tag me on social media.
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Here are links for the Adobe Illustrator files