at what ago do people grow into their features?

It’s starts at 16

like 20

I heard from one of my teachers that females start losing their beauty at age 25...

Purely anecdotal but it's what she told me

In their early twenties usually?

Look at all these female idols at 20, they all started having that womanly feeling no longer that teenage girl vibe , their features became bolder and body better.

Seolhyun (Heart attack era)

forum.allkpop.com/suite/attachment/10500/

forum.allkpop.com/suite/attachment/10501/

Tzuyu in Yes or yes era (2019)

7DB1B432-1BE7-42D5-AB48-931DCE23777D.jpeg

591FD061-8A77-4278-8B14-C3C1B0927525.jpeg

Suzy in hush era(2014)

9D3F6819-497E-473A-81B3-4713D1A1B058.jpeg

You can visibly see how they grew into their looks if you compare them to the eras before this