Scale prefab with scren Size

I have a problem with proper prefab display. In the editor everything is fine, but in the device does not work best. Code making buttons: I have a problem with proper prefab display. In the editor everything is fine, but in the device does not work best.

Code making buttons:

 Void CreateLevel ()
 {
 For (int i = 1; i <maps.Length + 1; i ++) {
 LevelButton.name = "LevelButton" + i;
 LevelButton.GetComponent <ButtonLevel> (). Level = i;
 Instantiate (LevelButton) .transform.SetParent (ParentLevelButton.transform);
 }
 }

![][1] Picture settings and game appearance in the editor and mobile device. [1]: /storage/temp/93580-error.png