This is the Przywróć okno 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.
There is a square with two other squares overlapping each other in the center of it. The two overlapping squares also have a line towards the top of them. The square to the right is overlapping and higher than the one on the bottom and left.