GUILayout.Width

Description

Option passed to a control to give it an absolute width.

Fixed width for a GUI Control.

    // Draws a  button with a  fixed width
    function OnGUI() {
        GUILayout.Button("A Button with fixed width", GUILayout.Width(300));
    }

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    void OnGUI() {
        GUILayout.Button("A Button with fixed width", GUILayout.Width(300));
    }
}