Minimalizuj okno 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).
This is a very simple icon that is composed of a square with slightly rounded corners. Inside the square is a thin rectangle with rounded corners. It is placed near the bottom of the larger square to represent the handle of a window.