The answer depends on what characteristic you wish to measure: it volume, total surface area, largest diagonal, mass, colour, temperature, density, ...
Scales to measure its mass and a ruler to measure the length of the cube's side.
Measure the length of the edge of the cube and multiply this by itself 3 times.Fill a measuring jug with enough water to cover the cube. Measure the level of water. Immerse the cube in the water in jug and measure the level of the water. The difference in level is the volume of the cube.
in units ;-)
I think that the most commonly used tool to measure the height of a cube is an everyday ruler.
Centimeter cube,Decimeter cube or Meter cube.
The measure of the edge of a cube that has a volume of 729 inches to the third is: 9 inches.
Fold our your 3D cube and measure all the way around it. If it is a 2D shape then measure around that. By G2010
Neither is a measure of concentration.
The measure of the angle of a cube is pi/2 steradians.
Volume
The volume of a cube whose sides measure four inches is: 64 cubic inches.
The volume of a 3-inch cube is 27 cubicinches. (not "inches")