सप्तारत्नि उत्सेधो नवायामो दश परिणाहः प्रमाणतश्चत्वारिंशद्वर्षो भवत्युत्तमः त्रिंशद्वर्षो मध्यमः पञ्चविंशतिवर्षोऽवरः ॥ कZ_०२.३१.११ ॥
saptāratni utsedho navāyāmo daśa pariṇāhaḥ pramāṇataścatvāriṃśadvarṣo bhavatyuttamaḥ triṃśadvarṣo madhyamaḥ pañcaviṃśativarṣo'varaḥ
By standard measurements—height of seven ratni, length of nine, and girth of ten—an elephant of forty years is ‘superior’, thirty years ‘middling’, and twenty-five years ‘inferior’.},{
A combined biometric (height/length/girth) and age-based grading scheme for valuation and assignment.
It standardizes pricing, roles (war/transport/ceremonial), and maintenance planning across the elephant establishment.