How tall can Japanese red-leaf tree Lagerstroemia indica grow?

The Japanese red-leaf tree Lagerstroemia indica can be known as a tree from its name, and it should be uncertain how tall it can grow, but now it is found that there is 15M Lagerstroemia indica, and the Japanese red-leaf tree Lagerstroemia indica should be ok. Because it hasn't been out for a long time, there is no big specification yet, and I'm not sure how many meters it can grow. If someone says that it can grow to 10 meters or 20 meters, it is definitely a fool.