Dimensions for large compartments: ca 48x32x16cm (24,5L) and ca 30x28x3cm (2.5L) for the front compartment gives 27L. The sizes of some manufacturers are grossly exaggerated (instead of 40 only 30 liters etc.) but here at Tatonka fits it wieder.Der backpack is quite robust and the details to convince me also once again from Tatonka rucksacks. The pattern of the interior incl. The laptop bag is a bit strange but ok The waist strap has no padding. This is seen in the figure, and also ok because it is not a touring backpack, but a city backpack. The square shape is ideal for laptop and folders. The only thing I miss are 2 instead of a compression straps on each side.