Gui.Label font size

Hello all. I have a simple pong game I am working on. Currently, I have a skin that displays both scores of each player as well as a message that reads "Player X Wins!" when the variable player1Win or player2Win is set to 1; Both the score and the message are the same font size. What I would like to do is make the message smaller so it doesn't take up so much of the screen.

 var theSkin : GuiSkin;
 
 function OnGUI()
 {
     GUI.skin = theSkin;
     GUI.Label (new Rect (Screen.width/2-150, 20, 100, 100), "" + playerScore01);
     GUI.Label (new Rect (Screen.width/2+150, 20, 100, 100), "" + playerScore02);
     
     if (player1Win == 1) {
         GUI.Label (new Rect (Screen.width/2-350, 200, 300, 300), "Player 1 Wins!"); 
     }
     else if (player2Win == 1) {
         GUI.Label (new Rect (Screen.width/2+100, 200, 300, 300), "Player 2 Wins!");
     }

Do I need to create new skin? Or is there a way to reduce the font size for individual labels? I attempted to create a variable called fontSize and set it to 12 as a test. I then placed it right after the message but it didn't work.

 GUI.Label (new Rect (Screen.width/2+100, 200, 300, 300), "Player 1 Wins!", fontSize);

Any advice?