I'm 22, so any girl 18 or over is approachable. Problem is girls these days look a lot older with make up and stuff. Sometimes I'm not entirely sure if she is over 18.

What signs do you guys look for to tell you that a girl is not underaged?

One thing I sometimes spot is their dress sense. Usually 16 / 17 year olds have a simple dress sense but that's not always the case some times.