How Big is the Deepwater Horizon Oil Disaster?

On April 20th, an explosion on the Deepwater Horizon left 17 workers injured and 11 missing and presumed dead. Oil is spewing from a well 5000 feet below sea level, discharging 200,000 gallons of crude oil a day according to the official estimate. It is estimated that more than 6 million gallons of crude oil have poured into the Gulf so far.

 
But how big is the spill, really? It's hard to get a sense of the true size when it's over the ocean floor. Use the links below to see how large the spill is, as of May 21.
 
http://paulrademacher.com/oilspill/#