Material must be at least 6.25" x 13". Thickness is up to you. I used 3/4" so that I could use a piece of 3/4" ply as my tape board.
Start by pocketing out each bowl to desired depth. I would leave at least a 1/4" for the thickness of the bottoms.
Then cut the outside profiles all the way through.
Sand the bottoms of your dishes OR save yourself some time and fill the bottom of the dishes with a thin layer of colored epoxy.