def create_button_label(icon, font_size=constants.FONT_SIZE_NORMAL):
    """Create a button label with a chosen icon.

    :param icon: The icon
    :param font_size: The size of the icon
    :return: The created label
    """
    label = Gtk.Label()
    set_label_markup(label, '&#x' + icon + ';', constants.ICON_FONT, font_size)
    label.show()
    return label