What is the growth and development of ball pythons?

A typical hatch-ling ROYAL PYTHON (it's designated name from it's Latin name of Python Regius) is roughly 6-7 inches long at birth, and typically the diameter of a UK 10p piece at its thickest point.

Hatch-lings will grow fairly quickly during their first two years - attaining 24 inches in their first year, and around 40 inches by the end of their second year. Many of the hatch-lings I've bred are now well over 60 inches long and a diameter of roughly 4 inches at the thickest part of their bodies ! Royal Pythons reach sexual maturity at around three years old - producing typical clutches of 15-25 eggs.