Givenchy Rucksack Backpack
W Base width: about 18.5 cm
H Height: about 26 cm
D Depth width: about 8 cm (excluding front pocket)
          
Shoulder length: removable
Total length when in use: maximum about 113 cm (including metal fittings)
7 belt holes: about 4.8 cm apart
For reference, the body size in the photo 
is about 157 cm in total length without head, about 36 cm around the base of the neck, 
about 38 cm around the shoulders,
about 77 cm around the bust, about 82 cm around the waist,
about 58 cm around the navel