Shop › Delaware Mermaid Postcard Image 1 of 2 Image 2 of 2 Delaware Mermaid Postcard $2.50 Matte postcard. 4 x 6 inches. Be notified when this item in back in stock! <p>Subscribe to our mailing list for updates about new products and offerings!</p><p></p> Quantity: Add To Cart Added! Matte postcard. 4 x 6 inches.