Sandro 100 percent wool sage green button cropped cardigan balloon sleeves small

100 percent wool. Authentic Sandro cardigan in beautiful sage green color. Boxy cropped fit. There does not seem to be a size. I would say fits oversized on XS and likely regular on a S. Approximate measurements: across shoulders 21 inches, pit to pit 21 inches, shoulder to hem 18 inches. There are no flaws that I noticed. There is the brass Sandro pin on the back.