Nike Ultimatum Max Air Backpack Bookbag, Blue Material:100%Polyester, Inner Material:83%Polyester,17%vinyl acetate Dimension::(W) 12.5" X (H) 20.8" X (D) 6.2" = (W) 32 cm X (H) 53 cm X (D) 16 cm Strap length: approx 99 cm Capacity: 33 Liters