What’s a gesture or behavior that instantly makes a woman seem classy?

Someone who you can tell she brushed her hair, she doesn't have to wear make up, but she's ... I don't know how to explain it without sounding like a douche but, someone who cares about how she looks. It could be something small, a haircut, a nice out fit.. clean white sneakers...right there I think.. she's classy.
And she's wearing something that fits her and makes her look good. Shape or weight doesnt matter. It's that shes not walking around wearing her boyfriends sweat pants.