How many stars were in the 1957 American flag?

The 1957 American flag had 50 stars, representing the 50 states of the United States. The design featuring these stars was adopted on July 4, 1960, but the flag was in use prior to that date with 50 stars, as Hawaii became the last state to join the Union in 1959. Thus, by 1957, the flag was already reflecting the addition of Hawaii.