What does a 23 year old woman dressing her age look like to you?

I am not trying to be mean. I’m just a 23 year old woman who isn’t the best when it comes to fashion and I want to dress my age. I went to a meeting where I was asked if I was under 18 recently and I would like to avoid getting questions like that again.

I tried asking a question like this on another site, but unfortunately didn’t get very many serious answers. It has been my experience that Flutherers give helpful answers, so I’ve chosen to come here.

Please feel free to show me picture examples of what a woman dressing her age (in good taste) at this age might wear.

Thank you in advance!