SB 1.19.26

taṁ dvyaṣṭa-varṣaṁ su-kumāra-pāda-
 karoru-bāhv-aṁsa-kapola-gātram
cārv-āyatākṣonnasa-tulya-karṇa-
 subhrv-ānanaṁ kambu-sujāta-kaṇṭham
Synonyms: 
tam — him; dvi-aṣṭa — sixteen; varṣam — years; su-kumāra — delicate; pāda — legs; kara — hands; ūru — thighs; bāhu — arms; aṁsa — shoulders; kapola — forehead; gātram — body; cāru — beautiful; āyata — broad; akṣa — eyes; unnasa — high nose; tulya — similar; karṇa — ears; subhru — nice brows; ānanam — face; kambu — conchshell; sujāta — nicely built; kaṇṭham — neck.
Translation: 
This son of Vyāsadeva was only sixteen years old. His legs, hands, thighs, arms, shoulders, forehead and the other parts of his body were all delicately formed. His eyes were beautifully wide, and his nose and ears were highly raised. He had a very attractive face, and his neck was well formed and beautiful like a conchshell.
Purport: 

A respectable personality is described beginning with the legs, and this honored system is observed here with Śukadeva Gosvāmī. He was only sixteen years of age. A person is honored for his achievements and not for advanced age. A person can be older by experience and not by age. Śrī Śukadeva Gosvāmī, who is described herein as the son of Vyāsadeva, was by his knowledge more experienced than all the sages present there, although he was only sixteen years old.