changing the sprite scale with screen resolution

ok ok i know the rule , search at first

search();
    if(search == null)
    {
    ask();
    }
so believe that its nearly an hour or maybe more that im searching but still....

im finishing my project and now i wanna change the scale of my sprites with different monitor resoluttion ive made my sprite with 1368 * 768 that is a 16/9 ratio…there are same questions in forum but whole of them are about gui …but i havent used from gui elements in my 2d game and ive only used sprites that got transform.localscale not rect…
thanx

Given that you are talking about game object in world space, their height will remain constant across all resolutions. So you only have to adjust the width. Given you have the aspect you authored for, the math is simple:

newObjectWidth = OldObjectWidth * 9.0 / 16.0 * Screen.width / Screen.height;