These are file folders from CTMH (Fancy Cut File Folders) the medium size.
Click the picture to make it larger. ( please note that the inside score marks are just for a guide when sewing. If you use ribbon or sassy strands you may not need these lines)
I attached all the folders one at a time on the lines
Here is what it looks like when all the folders are attached
Now you see the reason I created a spine cover for the book. My sewing skills lack!!!
Corner round all 4 book corners (optional)
I used a circle punch to make the indent area.