How can I PROPERLY keep a sprite on the camera boundaries?

I've been trying a MASSIVE ammount of coding to keep the FULL sprite inside of the camera. There's one that work pretty fine,but since the pivot-orcircleonthesprite-thing is in the middle,that said sprite gets cut in half. I've already been looking at some answers,but I'm so stressed with personal things that I can't concentrate properly anymore.

Here's the code I'm using. Changing width and height to any numbers works fine. (And I can't see any difference if I add 1,7 or 20.) Also sorry if this question has a pretty easy answer. UGH.

 float widthRel = width / (Screen.width); //relative width
  float heightRel= height /(Screen.height); //relative height
  
  Vector3 viewPos = Camera.main.WorldToViewportPoint (this.transform.position);
  viewPos.x = Mathf.Clamp(viewPos.x, widthRel, 1-widthRel);
  viewPos.y = Mathf.Clamp(viewPos.y, heightRel, 1-heightRel);
  this.transform.position = Camera.main.ViewportToWorldPoint (viewPos);