These fun glasses are vintage circa 1950s. They are made in France and the maker is Tres Gai. They are fashioned from black plastic of some sort and set with clear rhinestones on the top, bottom and sides. The marks inside are Tres Gai 5 1/5, Marine Frame France 5 1/4 and 48/18. They have prescription lenses and they seem to me to be for a distance with only a slight prescription. The front measures 5 x 1 1/2 inches and the side piece is 5 1/4 inches long. The condition is very good, they look a bit off center when they are  just sitting on a table but on my face they feel and look regular.