前发际至后发际。折为一尺二寸如人前发际不明者。取眉心直上行三寸。后发际不明者
。取
大椎上行三寸。(详见骨度)前后俱不明者。眉心起至大椎。共折作一尺八寸。头部直寸法根据
此。横寸法。以眼内 角至外 角。此为一寸
(按足太阳经曲差开督脉神庭一寸半。足少阳经本神开曲差一寸半。足阳明经头维开本
神一
寸半。自神庭至头维共得四寸半。皆以头之大骨围二尺六寸折法取之 眼内 角至外 角为
一寸。不能皆合)
大椎穴至尾 骨。共计二十一节。通折三尺(项骨三节不在数)上七椎各一寸四分一厘。
共九
寸八分七厘。中七椎各一寸六分一厘。共一尺一寸二分七厘。下七椎各一寸二分六厘。共八
寸八分二厘。总共二尺九寸九分六厘。不足四厘者。有零未尽也。背部直寸法根据此 横寸根据
中指同身寸法。脊骨内阔一寸。第二行夹脊一寸半。三行夹脊三寸。脊骨左右各半寸未算也
。凡夹脊一寸半者。当作去中二寸。(大杼等穴并根据此法)凡夹脊三寸者当作去中三寸半。(
附分等穴。并根据此法)
\r仰人部位图\pi-i20.bmp\r
\r伏人部位图\pi-i21.bmp\r
天突宛中至膻中折为八寸。下行一寸六分为中庭共得九寸六分。(一作八寸四分。误)
上蔽骨尖下至脐心。折为八寸人无蔽骨者。取岐骨下至脐共折九寸。脐心下至毛际曲骨穴折为
五寸。胸腹直寸法根据此 横寸法用两乳相去折为八寸。
(按骨度篇。两乳间广。九寸半。详较针灸书。足厥阴经期门在乳旁一寸半。章门去中
六寸。得两乳为九寸之数而足阳明经乳根。去中四寸。足少阳经带脉去中七寸半。得两乳间为八
寸之数。故各经开中寸法以两乳间。横折八寸约取之)
从前发际到后发际，折量为一尺二寸。如果人的前发际不清楚，就从眉心直向上取三寸；如果后发际不清楚，就从大椎穴直向上取三寸。（详细情况详见骨度篇）如果前后发际都不清楚，就从眉心起至大椎穴，总共折量为一尺八寸。头部的直寸测量法依据此标准。横寸测量法，以内眼角至外眼角之间的距离作为一寸（按：足太阳膀胱经的曲差穴在督脉神庭穴旁开一寸半，足少阳胆经的本神穴在曲差穴旁开一寸半，足阳明胃经的头维穴在本神穴旁开一寸半，从神庭到头维共得四寸半，这些都是根据头部大骨围长二尺六寸的折量法来确定的。虽然内眼角至外眼角为一寸，但不能完全吻合）。
从大椎穴到尾骨，共计二十一节椎骨，通折为三尺（颈项部的三节椎骨不计算在内）。上部七节椎骨每节各一寸四分一厘，共九寸八分七厘；中部七节椎骨每节各一寸六分一厘，共一尺一寸二分七厘；下部七节椎骨每节各一寸二分六厘，共八寸八分二厘。总计二尺九寸九分六厘。不足四厘的部分，是有零头未计入。背部的直寸测量法依据此标准。横寸测量法依据中指同身寸法。脊骨内部宽度为一寸，第二行夹脊穴距离中线一寸半，第三行夹脊穴距离中线三寸。脊骨左右各半寸的距离未计算在内。凡是说夹脊一寸半的穴位，应当当作距离中线二寸（大杼等穴位均依据此法）。凡是说夹脊三寸的穴位，应当当作距离中线三寸半（附分等穴位均依据此法）。
仰面人体部位图
俯卧人体部位图
从天突穴凹陷处至膻中穴，折量为八寸。向下行一寸六分为中庭穴，共得九寸六分。（另一种说法是八寸四分，是错误的）。从上蔽骨尖下至脐心，折量为八寸。如果没有上蔽骨的人，就取岐骨下至脐，共折九寸。脐心下至毛际曲骨穴，折量为五寸。胸腹部的直寸测量法依据此标准。横寸测量法用两乳之间的距离折量为八寸。（按：《灵枢·骨度篇》记载两乳之间广九寸半。详细对照针灸书籍，足厥阴肝经的期门穴在乳旁一寸半，章门穴距离中线六寸，这样算起来两乳间为九寸之数；而足阳明胃经的乳根穴距离中线四寸，足少阳胆经的带脉穴距离中线七寸半，这样算起来两乳间为八寸之数。因此，各经脉确定中线横向折量时，以两乳间横折八寸作为约数取之）。
From the anterior hairline to the posterior hairline, the measurement is one chi and two cun. If the anterior hairline of a person is unclear, measure three cun straight upward from the midpoint between the eyebrows (Yintang). If the posterior hairline is unclear, measure three cun straight upward from Dazhui (GV14). (For details, see the Bone Measurement chapter). If both anterior and posterior hairlines are unclear, measure from the midpoint between the eyebrows to Dazhui, totaling one chi and eight cun. The vertical measurement method for the head is based on this. For the horizontal measurement method, the distance from the inner canthus to the outer canthus is taken as one cun. (Note: Qucha (BL2) of the Foot-Taiyang Bladder Meridian is located 1.5 cun lateral to Shenting (GV24) of the Du Vessel; Benshen (GB13) of the Foot-Shaoyang Gallbladder Meridian is 1.5 cun lateral to Qucha; Touwei (ST8) of the Foot-Yangming Stomach Meridian is 1.5 cun lateral to Benshen. From Shenting to Touwei, the total is four and a half cun. All these are derived from the bone circumference of the head, which is two chi and six cun. Although the distance from the inner canthus to the outer canthus is one cun, it does not perfectly align with all measurements).
From Dazhui (GV14) to the coccyx, there are twenty-one vertebral segments in total, measuring three chi in length (the three cervical vertebrae are not included in this count). The upper seven vertebrae each measure one cun, four fen, and one li, totaling nine cun, eight fen, and seven li. The middle seven vertebrae each measure one cun, six fen, and one li, totaling one chi, one cun, two fen, and seven li. The lower seven vertebrae each measure one cun, two fen, and six li, totaling eight cun, eight fen, and two li. The grand total is two chi, nine cun, nine fen, and six li. The remaining less than four li represents an unaccounted fraction. The vertical measurement method for the back is based on this. The horizontal measurement method is based on the finger-biancun method using the middle finger. The internal width of the spinal column is one cun. The second row of acupoints adjacent to the spine (Jiaji) is one and a half cun from the midline. The third row of Jiaji points is three cun from the midline. The half-cun distance on either side of the spinal column is not calculated here. Whenever it states that Jiaji points are one and a half cun apart, they should be considered as two cun from the midline (acupoints such as Dazhu (BL11) follow this rule). Whenever it states that Jiaji points are three cun apart, they should be considered as three and a half cun from the midline (acupoints such as Fufen (BL43) follow this rule).
Diagram of supine body regions
Diagram of prone body regions
From the depression at Tiantu (CV22) to Danzhong (CV17), the measurement is eight cun. Moving downward one cun and six fen leads to Zhongting (CV16), making the total nine cun and six fen. (Another version stating eight cun and four fen is incorrect). From the tip of the xiphoid process downwards to the center of the umbilicus, the measurement is eight cun. For individuals without a distinct xiphoid process, measure from the costal angle (Qigu) down to the umbilicus, totaling nine cun. From the center of the umbilicus down to the pubic symphysis (Qugu, CV2) at the hairline, the measurement is five cun. The vertical measurement method for the chest and abdomen is based on this. The horizontal measurement method uses the distance between the two nipples, measured as eight cun. (Note: The "Bone Measurement" chapter states the breadth between the two nipples is nine and a half cun. Detailed comparison with acupuncture texts shows that Qimen (LR14) of the Foot-Jueyin Liver Meridian is 1.5 cun lateral to the nipple, and Zhangmen (LR13) is six cun from the midline, summing to nine cun between the nipples. However, Rugen (ST18) of the Foot-Yangming Stomach Meridian is four cun from the midline, and Daibao (GB26) of the Foot-Shaoyang Gallbladder Meridian is seven and a half cun from the midline, summing to eight cun between the nipples. Therefore, when determining horizontal measurements relative to the midline for various meridians, eight cun between the nipples is used as an approximate standard).