These round costume glasses are a great costume accessory for a variety of geek, nerd, professor and grandma outfits at costume parties, student nights and Halloween. The joke glasses with round black frame have thick magnifying glasses for an exaggerated short-sighted appearance and are the ideal carnival costume for various nerd themed parties. The glasses are not to be worn as a visual aid, but only as a costume or play accessory. One size fits most adults.