The basic design was based on the golden rectangle. The golden rectangle is a rectangle that can be divided into a square and another golden rectangle as below:
The golden rectangle was also forms the basis of the golden spiral
The shapes were perfect for sidewalk design because you can use them in many configurations and end up with a rectangle. Our largest piece of stone is a 65-inch square. It definitely weighs over 800 pounds. The others are smaller. Our smallest shape is 8 by 11 inches. We used a total of eight basic shapes and the contractor has had to cut some pieces to make it all work.