Dimensions: 18.8 x 5.1 x 13.7 inches; Fits up to 17.3 inches laptop. Still more room for you to keep 2-3 days summer clothes, ideal design for travel, business trip or work.Three carrying styles. You could use it as backpack shoulder bag and messenger bag. Also the straps can be hidden when you use it a messenger bag and shoulder bag. Why you should choose this bag: one bag pay and getting three bags useFour outside pockets, convenient to organize your items you want to carry, Just forget the pain point of finding things anywhereRoomy laptop compartment and accessory compartment.Special design laptop compartment with Telescopic belt provides more protection for your laptop. Still keep 3 days clothes for traveling. Roomy enough for your need.Lightweight design is easy for carrying. The top grab handle offers quick grab-and-go style. Ergonomic design ensures the dispersion of gravity of the fulled bag.This product is not suitable for under 13 years old children.