Great backpack. size is 20l bag. Very versatile and flexible. Come with the dividers (velcro) for creating compartments if you want to use that way. https://www.peakdesign.com/collections/all-bags/products/everyday-totepack?variant=29741599883308 Check out all the videos here for how to. Bag was used a handful of times..and has been in storage. Non smoking home. Dimensions are above in photos...but this can hold a 15"laptop