I'll admit, i didn't knew about the origin of the "S".
Also, your filename made me laugh fo some reason.>>107171291
And to clarify, here is how the bills look because it is easier to find an image than to try to describe colors. I'm no interior designer, i have no idea what the color names are and calling the color of the $100 one "reddish-brownish-copperish" sounds wau too bad for my taste.
in case it isn't that visible the order goes: $20, $50, $100, $200, $500 and $1000.
Yes, they are different sizes.