A set of sheet dividers comprises a first plurality of sheet dividers, each divider comprising a sheet with a tab extending therefrom at a different location and for a first length along the same side as all other dividers in the first plurality; and a second plurality of sheet dividers, each divider comprising a sheet with a tab extending therefrom at a different location and for a second length along the same side as all other dividers in the second plurality, the second length being shorter than the first length, the second plurality being divided into subsets of dividers having their tabs adjacent one another and overlaid by the tab of a corresponding one of the first plurality of sheet dividers when the subset and corresponding one of the first plurality of sheet dividers are stacked together.