JanSport Big Student School Backpack (Black/Electric Purple Flitter) Material: 100% Polyster Dimension:(W)Top 29.5 CM/ Down 31.8 CM X(H) 49 CM X(D) 13.5 CM =(W)Top 11.61" / Down 12.51"X(H) 19.29"X(D) 5.31" S-Curve Strap Length Approxmiately: 88.7 CM = 34.92" Outside Pocket: 5; Inner Pocket: 5 Whole Length of Deep: 29.5 CM = 11.61"