We have been looking for some polarized sunglasses that fit over our prescription eye glasses.  The ones recommended by our eye doctor are way too big and very ugly.  We found these on Amazon and liked the fact that we could select the size to best match our glasses.  These are great.  They fit well and seem to be well made.  We liked them so much that we have now ordered and received 4 sets.  We found some similar sunglasses at a local drug store and also at a superstore.  They were easily twice the price and were not polarized.