These V-Necks fit true to size! I would recommend to size up if you are in between sizes, chesty, taller or want the “baggy” look and size down if you want a “fitted” look. These measurements below are from seam to seam on the chest. Lay out your favorite shirt and measure for comparison! Small 17.25” Medium 19.25” Large 21.25” X-Large 23.25” 2XL 25.25”