Bread-Bakers v109.n023.7

At Home Depot, it's technically called "Saltillo Tile".  The people 
there didn't know what I wanted either, so I just went to the Tiling 
section (I remember they were among outdoor tiles) and they are about 
10" x 10", and look like unglazed flower pots.  They are terra cotta 
in color and should be about $1.