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.