bored bored bored ... need to sleep but can´t

I just changed some money for the next phase of my trip.
and got my hands on my first euros
got one question? who was the smart ass who decided to size bills
according to denomination?

and I the only one who thinks this is fucking stupid

look bills should be the same size
so they fit neatly folded into your pocket
and what not

the five euro bill is about the size of two credit cards
while the fifty looks like a rave flyer
I have to wonder if the hundred comes with its own carrying case?