How to change size of PIL fonts?

Hello Image-SIG,
I am a newbie to PIL, I have following code

    def __setFont (self, filename):
        pilfont = ImageFont.load(filename)
        return pilfont

    def drawImage (self):
        cg = CaptchaString(4)
        myString = cg.getString() #Some other object to get string from
        myFont = self.__setFont('E:\\pilfonts\\timB12.pil')

        img = Image.new('RGB', (220,90), '#FFFFFF')

        drawText = ImageDraw.Draw(img)
        drawText.text((6, 0), myCaptchaString, font=myFont, fill=(255, 100,
25))

        img.save('myFile.png', 'PNG')

I don't know how to set font size so that it appear larger

Devji Chhanga

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