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The 1966 Topps baseball card set features 598 standard size cards, which measure 2½" by 3½". The only subset for the 1966 Topps baseball cards is the league leaders (215-226). The high number series (523-598) is more difficult and expensive to collect.
The key rookie cards from this set include #126 Jim Palmer, #254 Fergie Jenkins, and #288 Don Sutton.
2010 Who's Who in Baseball