Each is 2-1/8". While the images have many similarities they also have differences to style of type as well as wording with the first reading "Worlds Fair 1904/California." Second rim text reads "California At Lewis & Clark Fair 1905." First button has a slightly concave surface as made. Couple of very faint gray dots on the rim edge but vast majority displays cleanly. Complete with its back paper promoting the area around Oakland. Second button has a single pinpoint raised cello dot which is exceedingly trivial. Reverse has a different back paper also promoting the area around Oakland. This one includes name of maker W&H. This one is NM displaying Mint.