$10 for 3 brackets 11 x 11 inches, for planks 8.5 - 12 inches deep. $20 for 7 brackets 11 x 9.25 inches, for planks 8.5 - 10 inches deep. $20 for 9 brackets 7 x 7 inches, for planks 6.5 - 7 inches deep. $10 for 4 brackets 7 x 6 inches, for planks 5.5 - 6.5 inches deep.