Each is 1.25". Both have W&H backpapers with their text along the bottom margin while larger space is devoted to the Expo. First cello reads "Missouri Mule/No Kick Comin!/A Hannerty Idea." Rump of mule reads "World's Fair 1904 St. Louis." Mule has bow around its neck with two rwb fabrics leading to his rear hooves. Small bit of faint stain, a little at lower right and a bit more on left side. Larger text on backpaper reads "World's Fair St. Louis 1904." Second cello has rim reading "Souvenir World's Fair 1904." At center is mule standing upright and holding a cane and using one hoof to hold a pair of eyeglasses while below is text "'I'm From Missouri Show Me'!!" Two small 1/16" stain marks on far right edge. Large text on this backpaper, which has small stain dot, reads "Copyright 1904 Missouri Mule Novelty And Advertising Co. St. Louis, Mo." Hake book Collectible Pin-Back Buttons photo example Louisiana Purchase Section #218-219. Comes with Hake's COA. Both VF and Rare.