This is the Karta bankowa tył icon for Windows 10. Here we go. Optimized for 32x32 px, these are the simplest icons in the line style. Downloadable formats are PNG and SVG, among others. Icons8 icon pack is unique in providing a huge number of icons designed by the same team of four designers who create the new icons every working day in the same style and with the same quality. Same cool as the Bat Face, huh.
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.