there is a slight lip on the edge and i do not have anyway to measure the thickness. maybe 1mm or so!Do you have a vernier calliper?
The edge always has 30mm, that's the thickness of the new discs.
You have to measure on the part of the rotor, where the brake pads have worn the it.
Are they laying outside all the time since the removal or just for the picture?
It's hard to say from the picture if they can be used again :-/
Can you ship to Germany?