Soft Gray Cashmere Sweater

Ordered several colors of this sweater on Amazon but they fit a little more snug than I prefer. They are stretchy, but I feel they run small. They say they are 100% cashmere and they are VERY soft and well made, but they don't have a fabric tag inside. The color is a perfect neutral gray. This is sized as a Medium but I am listing it as a Small. See measurements in photos. I am a Large and the Large fits like a Medium, so the Medium will most likely fit like a small.