I purchased clip on sunglasses years ago from a company who has gone out of business. I recently found The Sunglass Guy and they are the ones I used to have. They fit. It isn't just the size and shape of the sunglasses to my glasses, which is important, but the fact that the sunglasses don't touch my face...something that is not only irritating but distorts views. I also like that if you send a tracing of your glasses they will find the ones that fit best. Great service. Glad I found The Sunglass Guy...Rich