Astanga Hrudaya
गोपुच्छाकारमच्छिद्रं श्लक्ष्णर्जु गुलिकामुखम्। ऊनेऽब्दे पञ्च, पूर्णेऽस्मिन्नासप्तभ्योऽङ्गुलानि षट्॥१०॥
Gopuchhakara – resembling the tail of the cow in shape, Achidra – without holes (except at the ends), smooth, straight and with Gulikamukha – tip shaped like a pill.
english translation
gopucchAkAramacchidraM zlakSNarju gulikAmukham। Une'bde paJca, pUrNe'sminnAsaptabhyo'GgulAni SaT॥10॥
hk transliteration by Sanscriptवयोबलशरीराणि प्रमाणमभिवर्द्धयेत्। स्वाङ्गुष्ठेन समं मूले स्थौल्येनाग्रे कनिष्ठया॥१२॥
12 years 8 Angula 16 years 9 Angula 20 years and onwards it should be 12 Angulas only. These measurements may be slightly increased for those of other age groups based on age, strength and body build.
english translation
vayobalazarIrANi pramANamabhivarddhayet। svAGguSThena samaM mUle sthaulyenAgre kaniSThayA॥12॥
hk transliteration by Sanscript