Contains one large multi-level, tan rock hill, one medium multi-layer rock hill, and a small rock. The hills have plenty of wide, flat surfaces that you can place your models on as they climb over the rocks, or place other terrain pieces on the hill. The sheer back of the hill is designed so you can fit two hills together to form a larger hill, or place other rocks alongside of it creating a new shape. The large hill is 9 ½ inches long, 6 ½ inches wide and 3 inches tall at its tallest point. The medium hill is 4 ½ inches long, 3 ½ inches wide and 2 ¼ inch high. The small rock is about 2 inches square and an inch high.