Say you have lots of $100 dollar bills, stack it up in front of you.
It would be 3.9 inches high to be $1 million dollars.
It would be 327 feets high to be $1 billion dollars.
It would be 43.4 miles high to be $700 billion dollars
That is about 3/4 of the Washington DC beltway loop or a bit longer than the distance between DC and Baltimore
This will cost every American family $10,000
WaMu is seized by FDIC and sold off to JP Morgan for $1.9 billions. But the major cost would be the $30-54 billion dollars of write down on toxic loans