This is an M5 size system notebook hand-stitched from genuine leather. The approximate dimensions are 13cm (height) x 11cm (width) x 4cm (depth). The ring diameter is 20mm. The interior features a ring guard, pen holder, and ticket holder. A flap with a snap button closure is attached, with a pen holder on the inside of the flap. The exterior is made of Margaux Fog in Auroro (deep green), and the interior is made of Setouchi Leather in natural (uncolored). Margaux Fog for the exterior is a vegetable-tanned leather made from Margaux, a high-grade Italian leather produced using theバケッタ (vacchetta) tanning method, with a generous coating of white wax on its surface. Because the leather is well-oiled and coated with plenty of white wax, it develops a natural luster as the oil comes out and the wax blends in with use, changing to a deep color. This leather allows you to enjoy its aging process. Initially, the surface has a rough texture and a matte finish due to a scratch treatment, but it develops a sheen as it ages. It's a leather where you can really feel the changes through aging. Setouchi Leather for the interior is a high-grade domestic vegetable-tanned leather. Natural uncolored vegetable-tanned leather turns an amber color as it ages. This leather has a slight imperfection: some tanning agent powder (likely mimosa powder) remains. While it should become less noticeable as it ages, please refrain from purchasing if this is a concern. Both are sturdy and excellent leathers, so we hope you will enjoy using them for a long time by taking care of them occasionally and enjoying their aging process. *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. *The product is the notebook only. Refills and pens shown in the photos are not included.