This is a card and business card holder that can be attached to a mini 6-size system notebook. It has pockets on the front and back and has enough space to hold 2-4 cards or about a dozen business cards. The pockets are slightly larger to prevent cards from sticking out. I also added a pen holder for convenience. The leather used is Tochigi Leather in red for the center and pen holder, and Tochigi Leather in dark brown for the card holder, hand-stitched with Vinymo red thread. The edges are polished with Tokonole. *This item is also listed on other sites. Please note that we may cancel your order if it sells out quickly on those sites.