How much space will be inserted for a tab '\t' character. This is a multiplum of the 'spacebar' character offset.

	GetComponent(TextMesh).tabSize = 5;

using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    void Example() {
        GetComponent<TextMesh>().tabSize = 5;
    }
}

import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	def Example() as void:
		GetComponent[of TextMesh]().tabSize = 5