Vintage 1950s Harvard University decal measures 2.5 inches x 2.5 inches in very good unused condition. Produced by the Angelus Pacific Company of Fullerton, California. The instructions on the back are: 1) For inside of windshields or windows place on glass and slide paper away. 2) For application to opaque surfaces, slide design from paper to object. Wipe away any excess adhesive from decal with a wet rag.