ABOUT THE SIZE: The size of this backpack is 24*10.5*28.5CM . ORGANISE AND SHAPED YOUR BACKPACK: The lightweight bag organzier designed not only helps to keep your belongings organised and easily accessible without having to rummage around in the bag, but also helps to maintain the shape of the backpack. WON’T ADD WEIGHT: This backpack organzier is made of the latest upgraded Nylonn mayerial which is waterproof and lightweight, soft to the touch and wear-resistant, and easy to clean. It is more durable and fits the bag better than traditional felt fabrics LARGE CAPACITY: This backpack insert can easily fit A 4 size books, iPAD, mobile phone, thermos, wallet, daily necessities and so on