Thanks. Unfortunately I have no idea. Didn't even know there are sizes for lenses... is there some kind of standard I'm missing? However I could provide a outline/contour of the lens shape if you like. But the shape is slightly bent, so a simple 2D-sketch perhaps won't do it.
I still haven't inserted lenses in my glasses. But at least I have plans... an expensive one, a time-consuming one and a highly sophisticated one:
Plan A: Go to an optician with the frame and let them cut lenses to the planned size.
Plan B: Buy very cheap sunglasses with huge lenses. Take the lenses out and cut them on a grinding machine to the desired shape.
Plan C: Same as Plan B, but cut them with a laser attached to the 3d-printer.
Any further suggestions?