I can finally post photos again. I just want to thank you again for sharing your idea. I love it. And it works out great for me.
I used an old tablecloth. (Or at least old for me.) It's Appx. 15 x 15 finished. I would suggest just a smidge bigger pages for blocks with a lot of pieces. But, I don't know if too much bigger would actually be helpful. You know, the too much of a good thing.