its any standard 10" binder in the BlackHawk notebook cover. Make sure to look and be sharp with all your notes, cards, and contacts organized. Keep a note pad in the outside accessory pouch. Made of 1000D NyTaneon. All compartmens closed by #9 YKK zipper and sliders. Compartment dimensions: 10.5" x 8" x 2". Pocket dimensions: 9" x 7" x 1.5