Moonwind Bow Waterproof Kindergarten Kids Toddler Backpack Girls School Book Bag Size:(L*W*H)25*13*28 cm/9.8*5.1*11 inch, it is NOT FIT A4, please note the size before ordering Structure: 1 main pocket, 1 vice pocket, 2 side mesh pockets Water repellent nylon material, antibacterial, ergonomic, water-resistant, feel comfortable, and easy to clean Comfortable breathable widened straps and ventilation back design, effectively relieve shoulders pressure; 3 layers of comfortable system: breathable mesh system; widening delivery system; decompression seismic system Size:(L*W*H)25*13*28 cm/9.8*5.1*11 inch, please note the size before ordering