Original: The shape and size of the baseball glove is governed by official baseball rules; Section 1.00, Objectives of the Game, defines limits of catcher's, first baseman's and fielder's glove in parts 1.12, 1.13 and 1.14.
Simplified: The shape and size of the baseball glove is decided by official baseball rules; Section 1.00, Objectives of the Game, defines limits of catcher's, first baseman's and fielder's glove in parts 1.12, 1.13 and 1.14.