It would depend on what shape it was.
It can have any dimensions as long as they equal 8 cubic feet.
It could have any dimensions as long as they equal 1,069 cubic feet.
Any dimensions so long as they equal 16,710 cubic feet.
Usually it would be about 48" high by 65" long
Possibly 10 X 10 X 10 cubic gallons, but more likely closer to 5 X 10 X 20 cubic gallons. Any combination of numbers that will mutiply together and make 1000 cubic gallons.
You have three dimensions, so you are no longer measuring SQUARE feet but CUBIC feet. 10x10x12=1200 cubic feet.
There are an infinite variety of shapes and dimensions that one cubic foot of space can have.
That is related to the fact that space has 3 dimensions.
If those dimensions are feet, that's 2853.125 cubic feet. If those dimensions are inches, that's 1.65 cubic feet.
The dimensions.
Each of the three dimensions are 12.97430823 inches
There's no such thing as a "cubic litre". The litre is already a unit that has three dimensions and describes a volume of space. A cubic litre would have nine dimensions, and no physical significance.