The newest kid on the Zentangle block, 3Z tiles are triangular in shape with each side 3.5″ long, the same length as traditional square Zentangle tiles. That means 3Zs can be mixed with regular Zentangle tiles, or used on their own. They lend themselves very well to joining together, and you can create some interesting mosaics with more than one 3Z tile.
Try white, black, renaissance, or some of each. Mix and match as you like and see what you can come up with!