The perfect suit is almost never the first (maybe the third?) In most cases you will find out through wearing the suit for some time. Not only the weight of the fabric but also the structure of the canvas is an important factor. Some like wearing very lightweight cloth with some structure added through the canvas, others prefer heavier cloth with hardly any canvas. Even if you could find three guys with the exact same sizes (which you can't) they all will have a different opinion of how tight a waist or the shoulders should fit for example.
