The body length of the flame tortoise in adulthood is between 35-45 cm, and how big it can grow depends on the environment in which it is raised. Under similar circumstances, wild flame tortoises will be larger than those raised in captivity as adults. Because the space for living in the wild is relatively large, they have enough space for activities, and there are many kinds of food in the wild, which can ensure their comprehensive nutrition, so the length of wild flame turtles is generally more than 40 cm. If there is enough space and food, captive flame turtles can grow to more than 40 cm. If the breeding environment is poor and food is scarce, their body length can only grow to 35 cm, and some with poor physique may grow less than 35 cm.

Flame turtles have a long life span and do not grow very fast, so they have a longer adult time. Normally, it takes 7-8 years for captive flame turtles to mature and at least 9 years to reproduce. If it is a wild flame tortoise, it will last longer in adulthood. If breeders want them to breed, it is best to choose some older flame turtles, and the success rate of reproduction will be higher. Moreover, this can not only ensure the number of reproduction, but also ensure the quality of reproduction.