Overall: 1 1/2 in. ( 3.8 cm )
Gold star shaped metal pin-back button; American flag in center; red, white and blue.
This pin has 20 stars which means the addition of 7 states from 1795 to 1818. There was at least one addition every year after that until 1960. The 50th state became Hawaii.
Due to ongoing research, information about this object is subject to change.