In Zentangle® Untangled, I wrote about the official Zentangle® Kit and the materials used by CZTs. Anyone who has purchased a kit will probably agree this is the best way to start out. The Fabriano paper tiles and the Sakura Pigma Micron pens included in the kit are high quality materials, and if you can buy a kit, I’d encourage you to do so.
With that said, not having a kit or expensive art materials should not stop you from exploring the Zentangle art form. Use whatever supplies you have (including this workbook).
I recommend the Strathmore spiral-bound art journals because they lay flat. I think bristol paper works well. The sketchbooks are relatively inexpensive and are perfect for keeping your tangle practice all in one place.
I used the 51⁄2" × 8" (14cm × 20cm) size when playing with and practicing the new tangles I created for this workbook. It’s a handy size to keep in your bag or purse, so it’s easy to have it always within reach for whenever an idea comes to mind.
You’ll definitely need a graphite pencil. I also think the Faber-Castell Pitt artist pens are great.
But whatever you have in your art supply stash will do to begin with. We don’t pass judgment on art supplies here.