It's a small rectangle with rounded edges. There is a black bar that crosses the entire rectangle a centimeter from the top edge. There is a smaller line underneath the bar that is set slightly in from the left hand side and ends at the middle of the rectangle.
Related to Karta bankowa tył Icon
Related icons are the icons with matching tags, as well as all finanse icons. All icons are in the same flat style. You can either download free PNG icons or buy SVG vectors