DIY Shrinkage Ruler
One of the tricky things about making pots is that clay shrinks as it dries and fires. It is not all that bothersome until you have a custom order for mugs that need to be a specific height and diameter or you drop a casserole lid while unloading a too hot kiln. Whenever I have needed a pot of a specific size, I have sat done and done the math and then proceeded to make the pot to the size I computed. This works fine, but is time consuming when done over and over. Finally, a
