The dimension of this laptop Bag is 11.8L*3.9W*16.1H in. This stylish laptop backpack is made of high-quality water-repellent poly fabric. With built in USB charger outside and built-in charging cable inside, great convenience for charging your electronic items via connecting your own power bank, offers you a more convenient way to charge your phone while walking. Please note that this backpack doesn't power itself, USB charging port only offers an easy access to charge. Super Big Storage Space for Your Daily Necessities.