Original 1992 29c "World Columbian Stamp Expo '92" 2616 K.M.C. Venture 500th Anniversary Columbus Discovers America First Day Cover Set of (3). Canceled January 24, 1992 Rosemont, IL. Envelopes measure approximately 3 5/8" x 6 1/2". Please see pictures. Will be packaged well to assure no damage.