These are fine as a pair of sunglasses for people who don't wear glasses.  They don't fit over a pair of glasses unless they are very narrow and not very wide.  Your lenses will have to fit inside a 59x42 mm cup.  If you're under those dimensions, don't forget to allow for the width of the nose bridge. I think I'd be best served by wearing my glasses OVER these things.  Unless you can try them on in a store, these are a bad idea.  I give two stars because they have utility for people with small glasses.  I'd also wear them alone.  They may not be stylish, but they are servicable in that regard.