The canvas bag Dimensions: 37L*8W*29Hcm,( 14.5inch*3inch *11.4inches) which could fit up to 13.3"laptop the weight is 1.5Lb. 

Total:8 pockets 

Structure: one main zipper comparment with 2 Inner layers and 1 zipper pocket inside , 2 Front Pockets & 1 Back Zipper pouch ,one aditional zipper pocket on the flap cap. 

The capacity:you could put one 13.3" macbook air ,one A4 binder 2pcs of 300 sheets B5 books ,your phone wallet keys etc. 

Strap Adjustable Length: about 14 -28inch,you could use it as shoulder bags or crossbody bags by adjust the strap. 

Material :100% Cotton Canvas .there is velcro open and close this bag quickly and convinent.