This flexible double-sided leather "Thinker's Notebook" NoteHook folio comfortably holds four standard-thickness 5.25" x 8" notebook inserts, or six slim inserts when using a jumpband. A black elastic band holds the folio closed. Notebook inserts (sold separately) are held in place by four elastic bands, allowing the removal of inserts to refill as necessary. Color choices are exterior/interior colors. Interior elastic bands are med/dark gray and finished with my signature tie-off so that there is no knot in your notebook insert. Folio measures approx. 8.5" x 13" when open flat. See my "Collect Your Thoughts" notebook inserts and my 5x8 Get Intentional Planner set. These were designed to coordinate beautifully with this "Thinker's Notebook" NoteHook folio!