GUIStyle.border

설명

The borders of all background images.

This corresponds to the border settings for GUITextures. It only affects the rendering of the background image and has no effect on positioning.

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    private RectOffset bdr;
    void OnGUI() {
        bdr = GUI.skin.button.border;
        Debug.Log("Left: " + bdr.left + " Right: " + bdr.right);
        Debug.Log("Top: " + bdr.top + " Bottom: " + bdr.bottom);
    }
}