From the Dr. Seuss Stationery and Accessory Collection. Dr. Seuss Giant Pens. A giant sized pen featuring all of your Dr. Seuss favorites including Horton Hears a Who, Thing 1 and Thing 2, Cat in the Hat and Green Eggs and Ham. The Dr. Seuss Giant Pen is a great collectible for any fan! Four beautiful illustrations with your favorite characters. Includes 12 black ink pens which measure 6.5" long.