This is a black button blouse by Worthington Stretch in a size medium. Armpit to armpit measurement is 20. 5 inches. This is one of my all time favorite shirts, and I hate to let it go. You can dress it up or dress it down. You can pair it with any pants, jeans, or skirt. There is a very slight stretch to the fabric. It is 97% Polyester 3% Spandex. This shirt is so versatile and is a staple piece for any closet. It is still is great condition and has much more wear left. If it still fit me, I would keep it. Look at the pictures for close ups of the material. If you have any questions, feel free to ask. Thanks for looking!