This fine vintage advertisement for a 1940 ad for Kellogg's Corn Flakes Cereal which is in excellent condition. This vintage Food Magazine ad measures approx. 9 3/4 x 13 1/2. This vintage cereal magazine advertisement is suitable for framing. This vintage Kellogg's Corn Flakes magazine advertisement depicts a woman and she is saying Half-eaten breakfasts worried me frantic...till I found this simple answer.