This is a notebook cover for the Traveler's Notebook Passport Size, hand-stitched with genuine leather. It can hold one notebook in each of the left and right pockets, and one in the center elastic band, for a total of three notebooks. If you use the connecting elastic band, you can store two notebooks in the center, so I believe it can hold up to four notebooks in total. It comes with an adjustable pen holder. A uni-ball one P is shown in the photo. It should accommodate pens up to about 15mm in thickness. The outer leather is dyed pure white, and the interior is made of blue gradient-dyed vegetable-tanned leather. The thread is blue Vinymo, the edges are burnished with Tokonole, and the entire piece is finished with Renapur. The center elastic band is also blue, creating a refreshing design. *This item is also listed on other sites. If it sells out on another site first, we may have to cancel your order. Thank you for your understanding.