Unity Ortographic Width And Height

ortho.cs

// Height

float orthoSize = gameField.bounds.size.y / 2;

// Width
float orthoSize = gameField.bounds.size.x * Screen.height / Screen.width * 0.5f;

Camera.main.orthographicSize = orthoSize;

//See All
float screenRatio = (float)Screen.width / (float)Screen.height;
float targetRatio = gameField.bounds.size.x / gameField.bounds.size.y;

if(screenRatio >= targetRatio) 
{
  Camera.main.orthographicSize = gameField.bounds.size.y / 2;
}
else
{
  float differenceInSize = targetRatio / screenRatio;
  Camera.main.orthographicSize = gameField.bounds.size.y / 2 * differenceInSize;
}