EUC Benetton Black Fine Knit Cardigan Sweater - Women's Size Medium?

Very lightweight black cardigan sweater by Benetton. It has 8 square buttons down the front along with a tie belt made of same fabric. I do not know the fabric content as tag is missing, super lightweight and soft. Also no size tag but it could be a Small or Medium. Approximate pit to pit measurement is 17" and length from back neckline to bottom is 22.5". Excellent used condition. ****It has 1 tiny snag on the back as shown in last pic.