The Zentangle people recently came out with smaller tiles called “Bijou”–there’s a painfully cute backstory about a hitchhiking French snail involved (it’s rather sweet)–and I recently ordered a few for practicing single tangles at a time.
The nice thing about these smaller tiles is that they’re, well, smaller. I don’t have a ruler handy, but they’re only about 2″ square, while the standard size tiles are 3.5″ square or nearly 4 times the size. With the smaller size, I can concentrate more on each specific pattern I’m working on for that tile without having to think too much about the overall composition. And eventually, these will all be a good reference for selecting patterns for the larger tiles.