What Are Nine-Patch Patchwork Quilt Blocks?
Nine-patch quilt blocks initially contain nine equal squares. The squares are arranged three rows across and three down, like the simple nine-patch quilt blocks left and center in the illustration.
The drawing on the right illustrates one of thousands of nine-patch block variations. Called a double nine-patch, it replaces the square grids at the block's center and corners with smaller nine patch units.