Thickness of Hollow Cuboid is defined as the shortest distance between the adjacent and parallel pair of faces of the inner and outer cuboidal surfaces of the Hollow Cuboid. And is denoted by t. Thickness of Hollow Cuboid is usually measured using the Meter for Length. Note that the value of Thickness of Hollow Cuboid is always positive. Typically, the value of Thickness of Hollow Cuboid is greater than 0.