The main body of the bag is approximately 28cm wide x 11cm deep x 43cm high.  Very roomy and suitable for laptops, school books, sports kit etc. 

Zipped pocket inside the main bag.  It then fastens with a zip across the top, which then folds over and secures with a red strap. There is a zipped pocket on the outside, as well as holders on the sides suitable for bottles etc. The straps at the back are adjustable.  

Made from quite thick, canvas type material (most likely synthetic material). 

 

Listing lots of other items so please check them out. Happy to combine postage on multiple items.