WASHINGTON -- German Chancellor Angela Merkel heads to Paris to present Sunday to her colleagues from the euro zone a financial sector bailout plan for Germany that's expected to be more than half the size of what has been enacted in the U.S.

A person familiar with the situation told Dow Jones Newswires that the government is considering a total bailout plan of €300 billion to €400 billion ($402 billion to $536 billion), which includes state guarantees and the option to get a direct stake in banks. As part of this,...