Overall: 13/16 in. ( 2.1 cm )
Button: picture of rooster. Maker's information printed on paper on button interior: "THE WHITEHEAD& HOAG CO./NEWARK, N.J./PATENTED/JULY 17, 1894/APRIL 14, 1895/JULY 21, 1896"
Due to ongoing research, information about this object is subject to change.