Features: Craft from quality PVC, dirtproof, waterproof, light in weight, easy to clean. Small inner core type is 15.5x11.5cm/6.1x4.53in, Large inner core type about 22x16cm/8.66x6.3in, Small book sleeve type about 17.5x13cm/6.89x5.12in, Large book sleeve type about 23.5x17.5cm/9.25x6.89. WARM TIP: Please measure the refill papers before purchase! Fit for majority binder notebooks, binder notepad, binder scrapbook, book sleeve, novels, planners. The clear waterproof book sleeve, easy to view. Great choice for students, children, teachears, office women and men, etc. Keep the book, notes well-organised in the school bag, handbag, suitcase all the for time. Perfectly protect your notebook, novels, planners, memo book from being scratched, broken, wet. Specifications: Component: PVC Color: Clear Small inner core type: Approx. 15.5x11.5cm/6.1x4.53in Large inner core type: Approx. 22x16cm/8.66x6.3in Small book sleeve type: Approx. 17.5x13cm/6.89x5.12in Large book sleeve type: Approx. 23.5x17.5cm/9.25x6.89in Weight: Approx. 15g Package Includes: 1 Piece Transparent PVC Cover note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!