In order to have an exactly sized frame according to the anthropometric characteristics, one can not disregard the correct methodology for measuring the subject.

These measurements are of fundamental importance, therefore they must be detected with the utmost care, even repeating the same measurement several times. The subject must be in a well-erect position, with the back and shoulders resting on a vertical wall, in shorts, barefoot and slightly apart.

The measure must be taken with a team as wide as possible.

ARM SIZE
This measurement must be carried out by keeping the subject in the position described above. He must hold a cylinder with the same diameter as the handlebar and stretch the arm horizontally without removing the shoulders from the wall; the measure to take is that between the vertical wall and the cylinder.
MEASURE OF THE TRUNK
The subject must be seated on a stool, adjustable in height so that the legs assume a correct position, the back well erected so as to rest the pelvis and the back against a vertical wall, the shoulders in a natural position. The measure to be performed must be between the plane on which the subject is seated and the protrusion of the clavicle at the end of the shoulder.
THIGH OF THE THIGH
It is necessary to keep the subject in the same position used for the measurement of the arm, the tibia must be kept vertical and the thigh horizontal, support a rod to the rotule and measure the height between the wall and the rod.
TIBIA MEASURE
In the same position described above, make sure that the tibia is in a vertical position; the dimension to be detected must be that between the floor and a rod resting on the subject's knees at the upper protrusion of the rotules.
NOTE
Particular care must be taken to measure the "horse" and the "trunk".
In calculating the dimensions of the frame, these two measures have the greatest "weight". From an anthropometric point of view, a subject can be defined as "normolineo" when the relationship between the size of the trunk and that of the horse is around 0.73.
This measurement leads to the determination, for medium measurements, of a frame with substantial equality - or with small differences - of length between tube and horizontal tube (frame length). A prevalence in the size of the trunk / horse will lead to proportionally greater measurements of the horizontal tube / tube column. From the calculations resulting from this procedure we obtain a unique product, which varies from individual to individual.