Extensive-type leather measuring unit is the classic product in the field of measuring leather unit in the world. It has the outstanding advantage. A large sheet of soft leather (sofa leather, Nappa leather) can be measured under the extreme flat condition for measuring the area of leather. Comparing with the traditional vertical or horizontal measuring unit, it has a better measuring precision and stretching function in curl leather. In addition, it has a high finished product ratio and a high economic efficiency. It is an ideal equipment for leather factories to suit for the measurement of all kinds of leathers.