Barb - these are the crumb blocks I am working on currently. Each is 6.5 inches. I'm thinking of turning them into star blocks, but need to make more. Or just sash with cornerstones. They are very relaxing as you don't follow any rules! Some people use a foundation behind the crumbs, I did not and they don't seem to move. As you can see in the green block, the pieces get very small - I counted 39 in that block alone. I haven't gotten brave enough yet to mix colors, for me this let me go wild in a controlled way - can you tell I'm an accountant?