From the Kickstarter description:

"La Granda" is an additional box filled with colossal components: boards, buildings and player markers, dice, and more! Play your games of "La Granja" in a truly epic scale!"

The box is 40x38x10 cm large; the board game is 96x96 cm instead of 56x56 cm large; components, dice and other features are up to 30% bigger.