The Metropolitan Museum of Art Holiday Cards, Duvoisin Christmas Mischief, 15-Count (MXC1337) Box of 15 holiday cards, approximately 4.875 inches wide x 6.5 inches high Inside message reads, Merry Christmas Christmas Mischief artwork by Roger Duvoisin, a Swiss-born American writer and illustrator, best known for children's picture books Coordinating envelopes included Purchases of The Metropolitan Museum of Art cards help support the preservation of nearly 2 million works of art gathered from all over the world