Cotton/Maternal and Child Health Handbook Case Refill MUJI "Cotton Maternal and Child Health Handbook Case Refill Small" Brand new, unused. Stored at home. The following is a quote from the HP: You can organize your maternal and child health handbook, health insurance cards, etc. together. It comes with a D-ring that allows you to put a mark on each refill. It has 4 card pockets, and is a vertical storage type that is easy to take out. External size: Approximately 18x13cm (Internal size: Approximately 16x10.5cm. Depending on the amount and thickness of the stored items, the size indicated in the internal size may not fit.) Thank you.