how do i network sync scaling of character?

I tried using this script to make the player larger and smaller when pressing U or J wich kinda works.
Im new to networking and unity for that matter…

using UnityEngine;
using UnityEngine.Networking;
using System.Collections;

public class SinglepalyerSizeChanger : NetworkBehaviour
{
public GameObject player;
public GameObject model;

public float growvalue = 0.2f;
public float growvalue2 = 0.01f;

void Update()
{
    if (isLocalPlayer)
    {
        Enlarge();
        Dislarge();
        return;
    }

}
void Enlarge()
{
    if (Input.GetKeyDown(KeyCode.U))
    {
        player.transform.localScale += new Vector3(growvalue, growvalue, growvalue);
    }
}

void Dislarge()
{
    if (Input.GetKeyDown(KeyCode.J))
    {
        player.transform.localScale += new Vector3(-growvalue, -growvalue, -growvalue);
    }
}

}

But when using it on network the second player (or first if the second is growing/shrinking) sees the first guy floating in the air. The model doesnt grow.
Anyone have any idea about how i could do that?

[SyncVar(hook = “OnSetScale”)] private Vector3 scale;

[Command]
public void SetScale(Vector3 vec)
{
     this.scale = vec; // This is just to trigger the call to the OnSetScale while encapsulating.
}

private void OnSetScale(Vector3 vec){
    this.scale = vec;
    this.transform.localScale = vec;    
}