The pattern is fat quarter friendly so you have lots of options. Consider changing the background color too, for a stunning and unusual quilt.
While you can make your own template for the pyramids, the Fons and Porter 60 degree pyramid ruler will speed the construction process. You can purchase that here: Fons and Porter Pyramid Ruler.
The finished quilt, by designer Tony Jacobson, is 64″ x 79″. You can easily adjust the size by altering the number of blocks using the size options included in the pattern.