I am going to put up the details of my pattern on my blog today, but I have my journaling squares finishing at 4.5 inches and I will probably have 1/2 inch black sashing to make it look kind of like a window. The person I originally got this idea from (she did it in 2007) had rectangles that were 3.5 inches wide I believe. I wanted to make a King size quilt though, so I made mine bigger. I have some tips on the actual writing on the blocks part up on my blog and I also have a flickr group set up (linked from my blog) so people crazy enough to try this project can share tips, ideas, and encouragement. :)
Cheers!
Rachel