Twenty One Pilots Custom Casual Shoulders Backpack Students School Bag Hiking/Travel Backpack Approx dimension: 10.6"(L)* 5.1"(W)* 13.4"(H). Material: Oxford Fabric Suit for:?Packing Books, Mobile Phone, Wallet, Folders, Food, Laptop and iPad. Adjustable straps can be changed to be used as backpack, shoulder bag, sling bag or a Hobo Additional front back and side pockets to help organize other small items