Tommy Bahama Navy Shirt Dress-Size Medium/Tall-Button Down

This is a Tommy Bahama Navy Shirt Dress that is a size Medium/Tall. It is 100% Cotton. Laying flat, it measures: Armpit to armpit-20.5" and the length is 30.5". It has roll-tab sleeves. In great condition. Please measure something that fits you laying flat. The length is measured from the shoulder to the bottom hem. I measure pit to pit laying flat for the Armpit to armpit measurement. This is for both our benefits so there will be no hassle of returns for not fitting. Thank you in advance.