It is tagged a size medium, but I have also provided measurements below for the most accurate sizing information for you to use.

Measurements
15.5" pit to pit (31" bust/chest)
19.5" long

It has a small flaw, a tiny hole on the back of one strap which is shown in the photos.

Machine wash cold, inside out. Tumble dry low/no heat or air dry to reduce shrinkage.