Composition Notebooks by LEUCHTTURM1917. Details:This new size is inspired by the paperback book, a small and handy notebook with a flexible cover. The Paperback (B6+) size is an intermediate size, smaller than the much loved LEUCHTTURM1917 size of Medium but bigger than Pocket. Despite being lighter and softer, they still offer great functional details. Details: Gusseted pocket inside the back cover, contents page, 123 numbered pages, Detachable pages for notes, 2 Bookmarks and self-adhesive labels, 80g/m2 acid.