They fit well on my big head and are dark enough. The arm on my first pair broke and the seller sent out a replacement pair immediately, for no charge.
The glasses are nice and I love the wrap around frames. Maybe it is just the fit for me, but the reading lens sits just a little low, so when I am driving I have to tilt my head at an uncomfortable angle as well as look down to see what I need to. Over all I think it is a good product and I will use them just wish the bifocal area wa a bit bigger.Loved these glasses so much! Came very fast and were exactly like the picture. They sit well on my face and are absolutely gorgeous. Just ordered another pair.