When you order a pizza with everything on it, its called "The Works". This Susan has it all. A beautiful middle board that appears to have a river of Ambrosia running down the middle and several very pronounced areas within this middle board of Birds Eye Maple that give the appearance of boulders in the stream. This middle board is flanked with two boards on either side that are filled with Tiger Maple. The diameter is 19" because I didn't want to taker away from any of the figure of any of these boards. This is a truly unique showcase piece.