This is a **Muji Cotton Mother and Child Health Handbook Case Refill (Small)**. It is A6 size compatible and comes in a set of 4. In our home, we use it not only as a mother and child health handbook case, but also for adult medicine notebooks and health insurance cards. It's thin and lightweight, making it easy to carry around, and it's very convenient to have one per person. With a D-ring, it's also recommended to attach keychains, etc., to identify each family member. *Please note that this item has been stored at home. Please refrain from purchasing if you are concerned about minor details. *We are sorry, but this item is not subject to price reduction. Please refrain from price negotiations.