Cuddl Duds Gray 3/4 Sleeve Sleep Shirt-Size Medium-Very Soft

This is a Cuddl Duds Gray 3/4 Sleeve Sleep Shirt that is a size Medium. It is 81% Polyester, 14% Cotton, and 5% Spandex. Laying flat, it measures: Armpit to armpit-20.5" and the length is 36". It is very soft. It does have some light pilling but in good 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.