Armpit to armpit measures 20".

Length from collar to hem measures 24".

100% cotton. 

In good pre-owned condition,  especially considering it's age.  The tag says Large but we're listing it as a Men's Size Small based on the measurements. No noticeable flaws or defects.  Stored in a smoke and pet free environment.  Will ship out very shortly after purchase.  Please see pictures for greater detail.