💎HP! Long Ivory Wool Blend Sweater/Coat for Elegant Evenings. Vintage. Medium?

This is a vintage wool blend cream colored sweater with 3/4 sleeves. It has a v-neck and it is button down. The last button at the bottom is missing. This was hardly worn. It was wonderful as a dressy sweater over cocktail dress. Perfect for the evenings. This is vintage and very well made. The three quarter sleeves come to 21” from the top of the neck down. From the back of the neck down to the bottom is 37 in. It is not form-fitting so the pit to pit and waist measurements are the same, which is 20.5 in. no rips or tears or stains. I believe this is from somewhere between the 60s and the '80s. It is unlabeled so be sure to look at the measurements. I'm going to guess this is a small or a medium.