Using Java Swing class, how do I make my window bigger!?

package financialCalc;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class FinancialCalc extends JFrame
{
	private JPanel welcomePanel, greetingPanel, buttonPanel, blank, blank2;
	private JLabel message;
	private JButton autoPmt, mortPmt, homeAfford, costOfMin, exit;
	
	
	public FinancialCalc()
	{
		super("Financial Calculator Application");
		
		
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
		setLayout(new BorderLayout());
		
		
		
		
		
		buildWelcomeMenu();
		
		add(greetingPanel, BorderLayout.NORTH);
		add(welcomePanel, BorderLayout.CENTER);
		add(buttonPanel, BorderLayout.SOUTH);
		add(blank, BorderLayout.EAST);
		add(blank2, BorderLayout.WEST);
		
		
		pack();
		setVisible(true);
		
		
		
		
	}
		
	
	public void buildWelcomeMenu()
	{
		welcomePanel = new JPanel();
		welcomePanel.setLayout(new GridLayout(4,1));
		//welcomePanel.setSize(720, 1080);
		
		
		autoPmt = new JButton("Auto loan payment calculator");
		autoPmt.setMnemonic(KeyEvent.VK_A);
		autoPmt.addActionListener(new AutoButtonListener());
		
		mortPmt = new JButton("Mortgage payment calculator");
		mortPmt.setMnemonic(KeyEvent.VK_M);
		mortPmt.addActionListener(new MortButtonListener());
		
		homeAfford = new JButton("How much home can you afford?");
		homeAfford.setMnemonic(KeyEvent.VK_H);
		homeAfford.addActionListener(new HomeButtonListener());
		
		costOfMin = new JButton("True cost of paying the minimum payment");
		costOfMin.setMnemonic(KeyEvent.VK_C);
		costOfMin.addActionListener(new CostMinButtonListener());
		
		buttonPanel = new JPanel();
		exit = new JButton("Exit");
		exit.setMnemonic(KeyEvent.VK_E);
		exit.addActionListener(new ExitButtonListener());
		buttonPanel.add(exit);
		
		welcomePanel.add(autoPmt);
		welcomePanel.add(mortPmt);
		welcomePanel.add(homeAfford);
		welcomePanel.add(costOfMin);
	
		
		greetingPanel = new JPanel();
		message = new JLabel("Welcome to the Financial Calculations Application");
		greetingPanel.add(message);
		
		blank = new JPanel();
		blank2 = new JPanel();
		
	}
	
	
	private class AutoButtonListener implements ActionListener
	{
		public void actionPerformed(ActionEvent e)
		{
	
			
			
		}
	
	}
	
	private class MortButtonListener implements ActionListener
	{
		public void actionPerformed(ActionEvent e)
		{
	
			
			
		}
	
	}
	
	private class HomeButtonListener implements ActionListener
	{
		public void actionPerformed(ActionEvent e)
		{
	
			
			
		}
	
	}
	
	private class CostMinButtonListener implements ActionListener
	{
		public void actionPerformed(ActionEvent e)
		{
	
			
			
		}
	
	}
	
	
	private class ExitButtonListener implements ActionListener
	{
		public void actionPerformed(ActionEvent e)
		{
			System.exit(0);			
		}
	
	}
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	public static void main(String[] args) 
	{
		new FinancialCalc();

	}

}