Dimensions: 18.8 x 5.1 x 13.7 inches; Fits up to 17.3 inch laptop. Still more space to store 2-3 days of summer clothes, ideal design for travel, business trips, or work. Three Carrying Styles: You can use it as a backpack, shoulder bag, and messenger bag. Moreover, the straps can be hidden when you use it as a messenger bag and shoulder bag. Why you should choose this bag: pay for one bag and get three bags' use! Four Outer Pockets: Convenient for organizing your items you want to carry, just forget the pain of looking for things everywhere! Spacious Laptop Compartment and Accessory Compartment: Special design laptop compartment with a telescopic belt provides more protection for your laptop. Still space for 3 days of clothes for travel. Spacious enough for your needs. Lightweight design is easy to carry. The top handle offers a quick grab-and-go style. Ergonomic design ensures the distribution of gravity in the fully packed bag. This product is not suitable for children under 13 years of age.