There were four stamps in the Horses in Art series for the event (Horsin' Around, in case you're jumping in mid-stream). What can I say? The fat cave pony is my favorite. This series of stamps will also be up for adoption to be planted permanently elsewhere after they come home.
Cave Art, 1 7/8" x 1 1/8"
Chinese Art, 2" x 1 1/8"
Horse Rearing, 1 3/4" x 2 1/4"
Stylized Art, 1 7/8" x 1 3/8"