Which is biggest cubic feet or square feet?

"Cubic feet" is the description of a volume of space, like inside a bottle or a
warehouse. "Square feet" is the description of a surface area, like a wall
you're painting or a yard you're mowing.

They're different, and there's no way to compare them.

If you could talk about volume and area together and compare them, then
you'd be able to figure out how many acres of gas you put in your car last
month, or how many gallons of carpet you need for your bedroom floor.
"Cubic feet" is the description of a volume of space, like inside a bottle or a
warehouse. "Square feet" is the description of a surface area, like a wall
you're painting or a yard you're mowing.

They're different, and there's no way to compare them.

If you could talk about volume and area together and compare them, then
you'd be able to figure out how many acres of gas you put in your car last
month, or how many gallons of carpet you need for your bedroom floor.