Klon and other 68,000 icons from Icons8 icon pack follow the visual guidelines of the operating systems: Windows, iOS, Android KitKat, and Material. PNG format is free up to 100x100 px. Icons are availble for download in PNG and vector (SVG, PDF, EPS, and more).
A drawing of two people side by side with a small space between them. There is an arrow connecting the two at the torsos pointing from left to right. The people are simply shaped, like bathroom figures, with just a circle for a head, a basic body outline, and one thick leg.