German Chancellor Angela Merkel held that there is a need of sufficient permanent rescue mechanism for the euro area in terms of size.

She said this before a summit meeting with European Union leaders on Friday.

She said that the calamity mechanism will be worked out in its details in anticipation of March.

On Thursday EU leaders decided to make changes the union's treaty so as to make possible the creation of a permanent mechanism. This was decided to give support to concerned euro-zone countries and to provide help after a current temporary rescue facility expires in mid-2013.

However the size and details of the new mechanism is yet to be disclosed.

On Friday German government sources assumed that the question of the facility's size is silently untie.

On the other hand, in the summit EU leaders have failed to determine digging out disagreements over whether further and more immediate steps are required to end the liability crisis.

Luxembourg's Prime Minister, Jean-Claude Juncker said on Thursday EU leaders conversed about an offer to create common euro zone bonds.