9 Patch Quilt Blocks are one of the most easily identified grid patterns in quilting. These blocks are based on a 3x3 grid system. Some grid systems in nine patch blocks are of equal size, while others may contain a grid in which one column and row is larger than the other two rows.
In either case, the construction is always the same. First, the 9 individual pieces are cut, then 3 of the units are assembled to create a row, and when three rows have been assembled, they are sewn together to make the block.