Pretty in Pink Polyester Cardigan Sweater Size S

this new sweater is warm and quite heavy knit. There is no brand name tag. I bought it on line but it is too big for me.It seems big for a size Small. It has buttons down the front and is a V-neck. With sweater buttoned the bust measures 42inches. sweater length from shoulder seam to bottom edge is 26 inches. Itcan be washed i n cold water in machhine and dry in dryer on low.