Or I was once in a children's clothing store because I had to buy a gift for someone.
And I noticed that the clothing store had a "ruler", where you could stand and measure your height.
And it said stuff like "if you're ___ cm, then you're __ years old"
And if you're 170 cm, then you're 16.
And I'm a tiny bit shorter than that, so...
Okay, maybe I'm actually 15 years and many months old, going by that logic. (I forgot how tall a 15-year-old had to be...)
But well... I was 16 like a decade ago.
And 16 was also how old I was, when I became a kpop fan.