I used lovely black ribbon for the closure. This box holds about 40 regular Zentangle tiles. I think I am going to make a tan one for tan tiles and a black with white gel pen for my black tiles.
It's a pretty standard top-flap box cut to the dimensions of any size tile or Zendala.
You only need two strips of strong glue tape to hold the box together at the sides.
Just "like" my Crafting Passions facebook page, private message me your email address and I will send you the instructions (I promise to delete your address after sending!!!)
Have fun making your own Zentangle boxes.