Thanks Kathy but mine is still a smidge different!! I have that 3 patch and then I added an additional rectangle spanning the bottom (or top). If memory serves, each block is 12 1/2" square.
I love the link which shows all the ways the blocks can be arranged. I had no idea how I would lay this one out. I just made the blocks, laid them on the floor and moved them around. Hubby actually came up with the arrangement I will using. It's like stairs almost.