All three boxes are 9 x 8 1/2 x 4.
the number 4 that is on a box
Three #7 AC 9 x 8 1/2 x 4 boxes are stacked in a pyramid shape.
Three boxes stacked on top of one another with one that says 7AC.
three boxes on a floor with dimensions 9 x 8 1/2 x 4