----------
        size : float or {'xx-small', 'x-small', 'small', 'medium', 'large', 'x-large', 'xx-large'}, default: :rc:`font.size`
            If a float, the font size in points. The string values denote
            sizes relative to the default font size.
        Nú	font.sizez%Size is invalid. Valid font size are ú