The study of Fengshui told us that an object at a location with a certain dimension will radiates harmonic energy. To be auspicious, Fengshui practitioner advising us to use our sixth sense for a right length of a furniture or a distant for a room or a wall. This is why the Fengshui Ruler was introduced to people all around the world.
Fengshui Ruler calculator program to determine which part a lengthy distant belongs to. The result will show you in two parts. One is for a general use an the other one is for a shrine or tomb. if the result show in red and black colour. Red means auspicious and black means inauspicious.
* The trial version is possible to measure less than 100 cm only. *