One important sign of class is showing consideration and respect to others. This has no correlation whatsoever with financial or social status or race.
One example is how people cross the street. There are those who try to clear the distance quickly and nod to waiting cars in appreciation (classy), and those who tread slowly and don’t even acknowledge the cars waiting (arrogant).
A humble, Indian man today crossed the street in front of me and waved as a thank you, running so as not to make me wait. Much classier than most nowadays!! I saluted back thanking God for such polite humans.
It’s those little things 🙂