This colourful pop notebook binder is a collaboration from KOKUYO with SOU SOU. The Campus smart ring features 4 different designs from SOU SOU and can hold up to 25 B5 size loose leaf paper. KOKUYO Campus Smart Ring binder notebook features a light and slim body. As a binder, the ring can be opened and add extra sheets of 26-ring loose leaf paper. It can hold up to 25 sheets. The cover of the notebook can be folded back to save space on your desk. The notebook binder comes with 20 sheets of loose-leaf sheets of 8mm ruled paper. Size: B5/ 26 Rings // Inside Page: 20 Sheets of 8mm Horizontal Lines