Where can i find big but stylish school bag?

Heyy, so i live in the Uk and i have looked on websites such as Roxy,BillaBong,Animal and i do like alot of there schoolbags but they are just to small and some of the designs on them are just to over the top.The coat i have is the helly hansen hot pink and i would like a bag that matches that. Also i love nice unique designs that no one else would have but just not to over the top and it has 2 be big enough 2 fit my :folder,pencil case,purse, make -up bag and my p.e kit and also some other little small things like phone etc! Any help would be appreciated:) Thank-you