But everyone's different. In all sorts of encounters over the past couple of years alone, I've gotten every estimate of my age from 15 to 26.
Once someone didn't card me because he said "Nah, I'm sure you must be about 26." (I was about 19, I think.)
Just a year ago in a restaurant with my mom, the waitress thought me and my daughter were both her kids. LOL! (My mom IS a damn good looking grandma!)
And another time I was asked how old I was, I said 18, they thought I was 25.
Just a week ago, I said I was 22, they said "Oh, I thought you were about 17."
So.... whatever. LMAO
It can also depend on whether you're wearing make-up or not. I seem to notice if I'm wearing my everyday make-up, people think I'm young, like 18-20. If I don't wear any, people will guess as low as 15. If I'm wearing darker make-up, people think I'm in my mid-20s. So, it all depends.
Then there's of course degree of soberness, time of day, etc. etc......