Sizes are .75” to 7/8”. The first ever Red Cross button from 1911 is not in this group but the group does begin with rare 1912 button picturing Santa, equally rare 1914 button picturing Santa, exceedingly rare 1915 button picturing Santa although with numerous tiny craze lines that barely show and a 1916 button showing Santa with Red Cross pack plus the pine tree designed buttons for 1917 (a little tone and faint spot) and 1917-1918. All with backpapers by 4 different manufacturers.