Well I thought I found a bag for high school(I'm am going to be mostly carrying a purse and I'll keep a tote in my locker in case I need it).But now my school told me that the purse has to be the size of a notebook,or 9 by 12 at the most.I have been looking everywhere and cannot find a purse I like that is that small.I found a purse that you can change it's size and I really like it.It says it's 19 by 10,but I think that's when you wear it as a tote.Should I get it?Do you think it will be too big?Any different suggestions?

http://www.amazon.com/Giraffe-Designer-Inspired-Animal-Handbag/dp/B001JPF8G6/ref=pd_sim_a_5

Thanks!