My pony is still small after I change the size in the pony creation

[SolarEclipse12]

i dont know how to fix this and im not sure if it is suppoosted to be this way.

[Howitzer]

So the pony in the character creation is an adult, but when you start the game with that character for the first time, you begin as a child. In order to get your character to be an adult, you'll need to complete story quests where you eventually graduate and grow up into an adult.