All are made by New Era and are professional models just like the players wore. 1970's St, Louis Cardinals has a leeather band and is size 7 3/8. Early 1980's Chicago White Sox has a leather band. 1970's SanFrancisco Giants is a size 7 3/8. Early 1970's Detroit Tigers has tons of use and is a size 7 3/8. Cleveland Indians from the mid 1980's is the only one in the group that is identified with player number 4 under the brim and a letter from the Indians indicating it was worn by Tony Bernazard.