The new size tile from Zentangle® is 10,5"X 10.5" They named it "Opus" and you can find more about it in the Newsletter from November 29th. I do not have the original tiles but used drawing paper that I cut in that size. On the left I was playing with "Arukas", the new tangle and also the Challenge this week. Detail of right side Detail of the left side with the new tangle "Arukas"