This is a hand-stitched genuine leather notebook cover for a Traveler's Notebook Passport size. It can hold three notebooks: one in each of the left and right pockets, and one secured by the central elastic band. By using a connecting elastic band, you can store two notebooks in the center, so I think it can hold up to four notebooks in total. It comes with an adjustable pen holder. In the photo, a uni-ball one P is inserted. It should be able to accommodate pens up to about 15mm in diameter. The outer leather is Tochigi Leather's natural (cream) color, and the interior is Tochigi Leather's black nubuck leather. Black Vinymo thread was used, and the edges were burnished with Tokonole. Black was also used for the central elastic band, resulting in a calm design. *This item is also listed on other sites. If it sells quickly on another site, I will have to cancel the order. Thank you for your understanding.