Why does it get smaller when it's suppose to get bigger

So when you slide the slider the text is suppose to get BIGGER not SMALLER...anybody know what I've done wrong??

Code Java:

int height=100;
		int width=300;
		setSize(width, height);
		setLocation (0,0);
 
		sentenceLabel=new JLabel ("Music Volume");
		sentenceLabel.setFont (new Font ("Serif", Font.BOLD, 12));
 
		slider=new JSlider (1,5,1);
		slider.setPaintTicks(true);
		slider.setMajorTickSpacing (1);
		slider.setPaintLabels(true);
 
		sizeAction=new ChangeListener()
		{
			public void stateChanged (ChangeEvent event)
			{
				JSlider slider=(JSlider)event.getSource();
				Size=slider.getValue();
				sentenceLabel.setFont (new Font ("Serif", Font.BOLD, Size));
			}
		};
		slider.addChangeListener(sizeAction);
		add (slider);
		add (sentenceLabel);
 
	}