Patterned Pinch Sleeve Button-Up Shirt

I’m 5’4” and 145 lbs, I’ve never been a size small in my life, I’m a true medium. I purchase this shirt in medium but it was way too big, had to exchange for small and it was still too big. Sizing is way off if XS would be the right size for me. I looked up item in order history to write this review and now it says item is plus size, but description was never shown as plus size prior to purchase.