This is a handmade passbook case made from Oshima Tsumugi silk. It can also be used as a kaishi (paper) holder. The size is approximately 20cm wide and 10cm long. The lining is made of antique cotton fabric. It is wider than items 001-011, so you can also put banknotes in it. The fifth image is a group photo of the passbook cases that are currently for sale.