This is a vintage Far Side mug, decorated front and back with the cartoon captioned "the real reason dinosaurs became extinct." It shows dinos smoking cigarettes. The mug is 3 3/8" x 3 1/2." It is in good, gently used condition. The colors are bright. There is a line inside the mug base that looks like a crack, but it can't be felt, and doesn't go all the way through. It may just be crazing or a stain. The mug is dated 1982 and was made in Taiwan.