the blocks are 9x9. I used 2 1/2 inch squares to make the blocks. Thank you planodebbie. I did try to draw it out. I just looked at my drawing and I see what I did wrong. I just had an ah ha moment and a lightbulb went off in my head. I counted the 1/4 inch seam between the two different colors as 1/2. duh!!! So glad I asked for help and got a response though or who knows how long before I would have figured it out. thanks again. Plus my computer retired. So, I am using my sons laptop now and then. Gotta get that new computer but I have been too busy.