These Milton Bradley Division Flash Cards were my favorite find on my most recent visit to our local Goodwill Store, which happens to be conveniently located in the same shopping center as my favorite Post Office. This complete set of 55 cards set me back 97 cents. They are are copyrighted 1975 and 1963, so they are older than me and therefore vintage! I love flash cards, though not for their intended purpose, of course. These measure approximately 5-3/4 inches by 3-1/2 inches: the perfect size for some mail art postcards.