Fred Perry Sweatshirt Red and Grey Stripe XS but fits like a S

From my personal wardrobe, but a little too small for me nowadays.... Fred Perry! Gray and Red Striped Sweatshirt with Grey Ribbing and Navy Blue laurel logo. Good quality lightweight sweatshirt in good used condition. No stains or holes that I can see, but there is some piling. Label says it's an XS which might be a men's size because it fits more like a women's small. Armpit to armpit measurement is approximately 18.5" My dressform has a 35" bust, 28" waist, 38" hips and you can see that it's a very nice fit. Stored in a smoke-free home but not a pet-free home. I have cats :)