Pan shape Size Cups of frosting Approximate amounts of Icing needed are given here. Pan shape Size Cups of frosting Round 6x2 3 cups Hexagon 6x2 2 3/4 cups Round 8x2 4 cups Hexagon 9x2 4 3/4 cups Round 9x2 4 ½ cups Hexagon 12x2 5 3/4 cups Round 10x2 5 cups Hexagon 15x2 8 3/4 cups Round 12x2 6 cups Round 14x2 7 1/ 4 cups Heart 6x2 2 ½ cups Round 16x2 8 3/4 cups Heart 9x2 4 ½ cups Heart 12x2 5 3/4 cups Sheet 7x11 6 cups Heart 15x2 8 3/4 cups Sheet 9x13 7 ½ cups Sheet 11x15 11 cups Square 6x2 3 ½ cups Sheet 12x18 13 cups Square 8x2 4 ½ cups Square 10x2 6 cups Square 6x2 3 ½ cups Square 12x2 7 ½ cups Square 8x2 4 ½ cups Square 14x2 9 ½ cups Square 10x2 6 cups Square 16x2 11 cups Square 12x2 7 ½ cups Square 18x2 13 cups Square 14x2 9 ½ cups Square 16x2 11 cups Petal 6x2 3 ½ cups Square 18x2 13 cups Petal 9x2 6 cups Petal 12x2 7 3/4 cups Petal 15x2 11 cups