Marni silk blouse

Almost vintage Marni silk blouse. Turquoise with black abstract print. In EUC. This has been very well taken care of, only has very slight discoloration in the underarms which is not so noticeable unless you look for it. No other stains or damage. I love this piece but it hasn’t fit me for a while and I’d like to find it a good home. Is a size 40 so like a 2-4? Pit to pit is 17.5” waist 14.5”. I would say best for a size S.