Free birds women's small blouse green blue sheer pearlescent buttons

Free Bird sheer blouse (would look beautiful over a navy cami) I say this is a small blouse. There's not a tag stating the size. Please look at measurements below for sizing. armpit: 16.5" shoulders: 17" length: 18" sleeves: 22" 2 buttons at neck and 2 at waist. 2 buttons on each sleeve. Hand wash line dry