I passed a woman on the street a few weeks ago whose purse was - without exaggeration - larger than her torso. A small lady to begin with, the bag completely dwarfed her and I had to suppress a giggle.
I love big bags as much as the next girl, but there is a limit. Too big and it's bad for your back, looks ridiculous and makes it impossible to find your keys/bus pass/lip balm.
In this time of economic restraint, let's exercise a little of it on our purse size.