Here is my first attempt at bookbinding with longstitch through a slotted cover...which really isn't a good name for it because I didn't slit the cover, but used holes instead (lends a much neater look). It opens flat and measures 5½" x 4¼" with 160 pages (or 320 with both sides used) of 50lb. parchment-style paper.
The book's binding is completely hand-stitched with no paste or glue used at all. The binding is really sturdy. The leather is a nice saddle brown, soft yet hearty. And it smells great!
I really love these little books, and plan to make more when I have the time - they'll be available on my etsy shop.