Transform.localScale

public Vector3 localScale ;

説明

親の Transform オブジェクトから見た相対的なスケール

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    void Example() {
        // Widen the object by 0.1
        transform.localScale += new Vector3(0.1F, 0, 0);
    }
}