It can vary. Ironically, a lot of the time, as someone in North America, to look non-binary, you dress like a European man ;).

If you met me in person, you would probably assume I’m a man. I was “assigned male at birth” as it’s called, grew up viewing myself as a boy, and didn’t come to this understanding of myself until my 20s. I have a beard; I wear men’s pants, men’s shirts, and men’s shoes. I will bleach my hair and dye it when I have the executive function or help, and I’ll paint my nails (or my often, let my friends pant them).

That said, I did go by “he/they,” since probably 16, as I grew up in a socially liberal area, it was common in high school to introduce yourself with your name and pronouns as early as 2013, and I thought "I think being referred to with neutral terms feels cool and better almost?). I am attracted to women for the most part, but I’ve crushed on a couple guys in my day, not to mention other “nonbinaries”.

Furthermore, I’ve always been on the “alt” side of various subcultures and genres like Goth genres of music, science fiction, and have always felt drawn to more feminine-looking appearances of cis men, from something as simple as skinny jeans (still sold in the men’s section tho) to wearing a full-length skirt.