They are small.
They are mainly for reading.
To place them at the edge of the nose because they are not big enough to cover the entire eye.
However, the shape of each person's face plays an important role. So the review only concerns my own face (obviously). If you have the opportunity, it would be good to try them before buying.

Very good vmf. The only weak point is that one of the pairs was slightly crooked, difficult to fix, I don't want to break it and it doesn't have a 100% correct fit.

Very good, as long as sleep takes me sometimes! Something else is missing from my head, only at night