These fabulous glasses are definitely oversized and would be terrific used as sunglasses. They currently have a prescription RX (progressive) and so would most likely need to be replaced. They possess wonderful workmanship, and have nose clips that can be adjusted for maximum comfort. They are 6" wide across the front and 2-1/4" tall. The frames are marked "Christian Dior" (though the mark is somewhat faded at the end), and also "Made in Austria" and "2250 47 63 (rectangle) 17." Quality eyewear all the way.