This is a hand-stitched, genuine leather M5 size system planner. The approximate size is 13cm (height) x 11cm (width) x 3cm (thickness). The ring diameter is 15mm. The interior features a ring guard, pen holder, and ticket holder. A flap with a spring snap closure is attached, and a pen holder is located inside the flap. The exterior is made of Margot Olmo (brown) leather, and the interior is made of Setouchi Leather (natural). The Margot leather on the exterior is a high-quality Italian vegetable-tanned leather made using the vacchetta method. This leather is well-oiled, and as it is used, it develops a natural luster and ages to a deeper color. Initially, the surface has a rough, matte texture due to the scratch processing, but it becomes glossy with age. This leather allows you to really feel the changes brought about by aging. The Setouchi Leather on the interior is a high-quality domestic vegetable-tanned leather. The natural-colored vegetable-tanned leather will turn to an amber color as it ages. There is a slight imperfection in the leather, as some tanning agent powder (probably mimosa powder) remains. It should become less noticeable with aging, but please refrain from purchasing if you are concerned. Both are excellent quality leathers. I hope you will take care of them occasionally and enjoy the aging process while using them for a long time. ※This item is also listed on other sites. If it sells quickly on another site, your order may be canceled. Please understand. ※The product includes the planner body only. The refills and pens in the photos are not included.