Most Helpful Guy
It depends. I'm pretty close to that age. Because I'm a student, I need the girl to be somewhere along her education that matches mine. For example, I'm a grad student so she has to be in 2nd or 3rd year of her education.
As you can see it's more about their life goals matching mine, as well as their maturity. I've met some women who are 20/21 when I'm 27 and it wouldn't be an issue at all.