This is a brand new and tagged Brooks Brothers Regent pink, blue & white strip seersucker short sleeve shirt size is S, this is 100% all cotton. This is part of a new lot of shirts I have just got but please don't ask me to measure the shirt for you as I will not be able to put them back as they should be. But on Brooks Brothers site size S is chest 37-38.5 neck 15 & waist 31.5-32.5.