Backpack ( with 15.6" computer compartment ) : 45 x 28 x 17cm/ 17,7 x 11 x 6,7 inch
Small Bag-1 : 21 x 4 x 13cm/ 8.3 x 1.6 x 5.1 inch; Shoulder strap max. 130cm/ 51 inch
Small Bag-2 : 24 x 5 x 17cm/ 9.4 x 1.9 x 6.7 inch; Shoulder strap max. 140cm/ 55 inch
Capacity 30L, fits for 15.6 inch laptop. The two included small bags can be used aloneor as small secondary bags on the backpack. How to use them depends on your needs.