It takes 4-5 years for a razor turtle to reach 10 centimeters. The specific length of time depends on the breeder's feeding methods and environment. Generally, the adult size of razor turtles is about 15 cm, and the largest razor turtles can grow to about 17 cm.

The body length of razor turtles is 1.5-2cm when they are born. In the first year after they are born, their growth rate is relatively fast. If the environment is suitable and the food is sufficient, they can grow about 5cm a year. But in the second year and subsequent years, their growth rate will slow down, growing 1-2 cm a year.

When raising razor turtles, the owner must provide them with a suitable living environment and maintain various factors such as water quality and water temperature, so that the razor turtles will grow larger.