i 28
I am 17 but people have been mistaking me as 18+ since I was 14 (I have no features to suggest that I am but what do you know...)
You tall? These days kids with 14 years old is more taller than me when i had 17.
So probally is the face, uhhh, i cant explain, but you can guess someone age by the face.
To be fair it's usually when I'm with my younger brother, who looks significantly younger than me (despite only a couple minutes of difference)
Yeah I have a twin (but I've always been treated and expected to act as the older of the two)