GUI layout label - how to limit text from going too far?

Like on this picture: Piclair - Screenshot sharing

It goes all the way to the right,then goes to the next line, but what if i want to limit it only to that red line: Piclair - Screenshot sharing and then go to the next line, how do i do it?

This is the script used for my chat layout:

GUILayout.Space (400);
		for (int i = chatHistory.Count - 1; i >= 0; i--) {
			GUILayout.Label(chatHistory*);*
  •  }*