Krishna’s periods of age are three and are called:
- Balya (or kaumara), from birth to five years;
- Pauganda, from five to ten years;
- Kaisora, from ten to little less than sixteen years. To be more precise is 15 years 9 months 7 1\2 days.
Sri Krishna is nava yavanam, eternally young. He never goes beyond Kaisora age.