How to change the icon size?

[KaffeMitMilf]

Hey, I added a Icon to my app using

    import sys
    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.setWindowTitle("Hue Control")
    MainWindow.setWindowIcon(QtGui.QIcon('icon.png'))
    MainWindow.show()
    sys.exit(app.exec_())

but its way to small...
Is there a way to change the size of it?

Thanks!

[AxelVienna]

In this post you will find a small method to change an icon’s size (and colour, meant for unicolour svg icons).

[SimonSchroeder]

I don't know a way to change the size of the windows icon. Isn't this size prescribed by the window system/operating system? Do other programs have larger icons?