This shirt is size medium and made by Guru Sportswear. It is made with 100% polyester and machine washable. The bust measures 19 1/2" across and it is 26" in length from the back of the neck with 1 1 /2" vents on the sides. This shirt is new with the tags still on it, might have some wrinkling with shipping. Very nice shirt for any activity or every day wear.