To promote her school's annual Kite Olympics, Genevieve makes a small kite and a large kite for a bulletin board display. The kites look like the one in the diagram below. For her small kite Genevieve draws the kite on a one-inch grid. For the large kite she doubles both the height and width of the entire grid.

Genevieve puts bracing on her large kite in the form of cross-connecting opposite corners of the kite. How many inches of bracing material does she need?