Actually found a little down time to play with some more Zentangles. The square is a 3.5" x 3.5" Zentangle tile and the little laminated bookmark is a scrap of printmaking paper which started out as an example for someone.
Had some colored card stock laying around so decided to play a little more. Very cool! These are also 3.5" square but I think a bigger square is called for........don't you?