I would give it a 5, but the sleeves are about 1-2 inches too short. I'm a normal size 12, 130 lbs and have to keep pulling them down as they don't go over my wristbone, and I don't have extra long arms. I usually wear them under a shirt or sweater because of the short sleeves. I've tried size large, but they are too big and baggy. Other than that, the material is wonderful, washes great and so comfortable.
I have been buying these pima cotton shirts for many, many years. I liked the weight of the fabric. However, the material on this recent one is definitely thinner than any previous ones. I will wear it but probably always under a sweater.
I have 3 of these tnecks and will surely be adding more to the collection. The fit is perfect and the fabric is fabulous -- light, but not too light, and it has a lovely drape. I can wear these with jeans or equally easily with dress slacks or a skirt. The hemmed sleeves are a nice touch too.
This top is really soft and comfortable. The neck is not too tight. It launders beautifully and retains its shape. Like the color selection. Great for layering in the chilly Maine fall, winter and spring.