A. Byer black blazer size medium. Strap on the back and three buttons at cuff area of sleeve. There are two extra buttons on the fabric tag. Small slit at back. The approximate arm pit to arm pit measurement is 17 inches. This listing is for the blazer only. The dress in photo is in a separate listing. My bundles do 10% off but open to offers. Once again, this is the blazer only.