Our method begins with checking the shoulder seam, the padding, and the lining. We measure carefully so nothing pulls or puckers when you move. We then loosen some of the lining, adjust the shoulder pad (if there is one), and bring the seam closer to your actual shoulder width. We reshape the outer fabric and inner lining, remove excess cloth if needed, and then sew everything so the new line is smooth. After stitching, pressing, and finishing, your jacket sits neatly.https://crivva.com/trust-jackets-shoulder-shortening-in-dip-perfect-fit/