是指依据被取穴者本人手指所规定的分寸以量取腧穴的方法。此法主要用于下肢部。在具体取穴时,医者应当在骨度折量定位法的基础上,参照被取穴者自身的手指进行比量，以确定腧穴的标准定位。

中指同身寸:以被取穴者的中指中节桡侧两端纹头(拇指、中指屈曲成环形)之间的距离作为1寸。(图1)

拇指同身寸:以被取穴者拇指指间关节的宽度作为1寸。(图2)

横指同身寸(一夫法):被取穴者四指并拢，以其中指中节背侧远端横纹为准，其四指的宽度作为3寸。(图3)

The finger-cun measurement method refers to the proportional measurement method for locating acupuncture points based on the size of the fingers of the person to be measured. This method is mainly used on the lower limbs. When locating an acupuncture point, the practitioner, in addition to using the proportional bone (skeletal) measurement method, may use the finger-cun measurement of the patient being measured in order to verify the standard location of the acupuncture point.

Middle-finger cun: The distance between the ends of the two radial creases of the interphalangeal joints of the middle finger is taken as 1 F-cun when the thumb and the middle finger are flexed to form a circle. (Fig1)

Thumb measurement: the width of the interphalangeal joint of the thumb is taken as 1 F-cun. (Fig2)

Finger width measurement: when the index, middle, ring and little fingers of the subject are extended and closed together, the width of the four fingers on the dorsal crease of the proximal interphalangeal joint of the middle finger is taken as 3 F-cun. (Fig3)

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