From the Dr. Seuss Costume Collection. Cat in the Hat Smiling Hat. A new twist on the classic Cat in the Hat striped hat, this fun hat features the face of the Cat in the Hat himself, just below the brim! One size fits most adults and children ages 12 and up. Product sold under license from Dr. Seuss Enterprises, L.P. The company offers its customers a large variety of fun accessories from head to toe. elope is a B2B site based in Colorado Springs, Colorado that sells fun, party, and costume hats, glasses, sunglasses, and accessories to retailers around the world.