// Scales PERMANENTLY the size of the mesh by a factor.

var scaleFactor : float = 2;

function Start () {
    var mesh : Mesh = GetComponent(MeshFilter).sharedMesh;

    var vertices : Vector3[] = mesh.vertices;
    for (var p : int = 0; p < vertices.Length; p++) {
        vertices[p] *= scaleFactor;
    }
    mesh.vertices = vertices;
    mesh.RecalculateNormals();
}

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    public float scaleFactor = 2;
    void Start() {
        Mesh mesh = GetComponent<MeshFilter>().sharedMesh;
        Vector3[] vertices = mesh.vertices;
        int p = 0;
        while (p < vertices.Length) {
            vertices[p] *= scaleFactor;
            p++;
        }
        mesh.vertices = vertices;
        mesh.RecalculateNormals();
    }
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

    public scaleFactor as single = 2

    def Start():
        mesh as Mesh = GetComponent[of MeshFilter]().sharedMesh
        vertices as (Vector3) = mesh.vertices
        p as int = 0
        while p < vertices.Length:
            vertices[p] *= scaleFactor
            p++
        mesh.vertices = vertices
        mesh.RecalculateNormals()