This is a military backpack in A-TACS camouflage, expandable thanks to the MOLLE system. The dimensions are as follows, according to the shop's product description: Body: 44 x 23 (max 24) cm Main: 44 x 23 x 11 cm Second Tier: 40 x 20 x 7 cm Third Tier (Top): 12 x 18 x 6 cm Third Tier (Bottom): 25 x 18 x 6 cm There was no mention of the back pocket, so I measured it myself. It seems like something roughly 20 x 28 cm would fit. *Please note that there may be slight individual differences, and as this is a fabric product, please consider these dimensions as a guideline. Although it is used, there is no noticeable damage, and it is still in good condition. I am sorry, but I do not respond to price negotiations in the comments.